Primary Sources:

Boots, Karen. “Spotlight Record stores sell cassettes with music by local bands.” Ball State Daily News, April 2, 1985. https://dmr.bsu.edu/digital/collection/NoBarGBChaosR/id/239

Culture Cringe. Culture Cringe Cassette Releases. Self-published, 2013. https://archive.org/details/culture-cringe-cassette-releases_202502/page/n5/mode/2up.

Dormon, Bob. “Compact Cassette Supremo Lou Ottens Talks to El Reg.” The Register, November 2, 2013, https://www.theregister.com/2013/09/02/compact_cassette_supremo_lou_ottens_talks_to_el_reg/. 

Menard, James Z. “High Frequency Magnetophon Magnetic Sound Recorders.” Field Information Agency, Technical 705, (1946): 5-23. Foundation for German Communication and Related Technologies.

Stereo Tape Cartridge Player/Recorder, RCA Victor, “RCA Victor Announces Major Break-Through in Recorded Sound” advertisement, www.museumofmagneticsoundrecording.org

Secondary Sources:

Clark, Max, and Henry Nielsen. “Crossed wires and missing connections: Valdemar Poulsen, The American Telegraphone Company, and the failure to commercialize magnetic recording.” Business History Review 69, no. 1 (1995): 1. ProQuest.

Crews, Andrew D. “From Poulsen to Plastic: A Survey of Recordable Magnetic Media.” The Cochineal, (2003). Archived December 18, 2013, at https://web.archive.org/web/20131218095921/https://www.ischool.utexas.edu/~cochinea/html-paper/a-crews-03-magnetic-media.html. 

Demers, Joanna. “Cassette Tape Revival as Creative Anachronism.” Twentieth-Century Music 14, no. 1 (2017): 109–17. https://doi.org/10.1017/S1478572217000093.

De Vries, Marc. “80 Years of Research at the Philips Natuurkundig Laboratorium (1914-1994): The Role of the Nat.Lab. at Philips.” Amsterdam University Press, 2005.

Drew, Rob. Unspooled: How the Cassette Made Music Shareable. Durham, NC: Duke University Press, 2024.

Engel, Friedrich, and Peter Hammar. “A Selected History of Magnetic Recording.” (2006): 1-10. Richard L. Hess. https://www.richardhess.com/tape/history/.

Hill, James. “A Brief History of Music Formats.” UnifiedManufacturing. January 16, 2022. https://www.unifiedmanufacturing.com/blog/a-brief-history-of-music-formats/.

Kimizuka, Masanori. “Historical Development of Magnetic Recording and Tape Recorder.” National Museum of Nature and Science Reports on the Systemization of Technologies 17, (2012): 185-273. Museum of Magnetic Sound Recording. https://r2rtx.org/index.php/node/7.

Masters, Marc. High Bias: The Distorted History of the Cassette Tape. Chapel Hill: The University of North Carolina Press, 2023.

Miel, Rhoda. “Obituary: Compact Cassette Tape Inventor Lou Ottens.” Plastics News 32, no. 1 (March 15, 2021): 20. https://research.ebsco.com/linkprocessor/plink?id=be6f5566-fff9-3adf-a0ea-d767e794acc2. 

Museum of Magnetic Sound Recording. “Cartridge and Cassette Tape Recorders.” https://museumofmagneticsoundrecording.org/CassetteRecorders.html 

Nathan, John. “Sony: The Private Life.” Boston: Houghton Mifflin, 1999. https://archive.org/details/sony00john/mode/2up.

Pierce, David. “Sony’s Walkman Turns 35: The Gadget That Started It All.” The Verge. July 1, 2014. https://www.theverge.com/2014/7/1/5861062/sony-walkman-at-35.

Singer, Howie, and Bill Rosenblatt. Key Changes: The Ten Times Technology Transformed the Music Industry. 1st ed. New York: Oxford University Press, 2023. https://doi.org/10.1093/oso/9780197656891.001.0001

Sony Corporation. “Sony Celebrates Walkman® 20th Anniversary.” Sony Group Portal, July 1, 1999. https://www.sony.com/en/SonyInfo/News/Press/199907/99-059/.

Taylor, Zack and Seth Smoot. “Cassette: A Documentary Mixtape.” Gravitas Ventures, 2016. https://video.alexanderstreet.com/watch/cassette-a-documentary-mixtape.

Images

8 Track Tapes. n.d. Ajournalofmusicalthings.com. https://www.ajournalofmusicalthings.com/gadget-history-the-story-of-the-8-track-tape/.

“A Telegraphone of the Wire Type” (1906). 1906. Usc.edu. https://scalar.usc.edu/maker/record/media/telegraphoneofwiretype.

Boots, Karen. Record Stores Sell Cassettes with Music by Local Bands. 1985. Ball State University Archives. https://dmr.bsu.edu/digital/collection/NoBarGBChaosR/id/239.

Culture Cringe. Culture Cringe Cassette Releases – Cassette Store Day Compilation. 2013. Archive.org. https://archive.org/details/culture-cringe-cassette-releases_202502/page/n5/mode/2up.

Jeh92. RCA Quarter-Inch Tape Cartridge, Shown with Standard Compact Cassette for Size Comparison. 2010. WikiMedia. https://commons.wikimedia.org/wiki/File:RCA_Quarter_Inch_Tape_Cartridge_2A.png.

National Museum of American History. German “Magnetophone” WWII Field Tape Recorder. n.d. National Museum of American HIstory Collections. https://americanhistory.si.edu/collections/object/nmah_713300.

Philips Company Archives. Lou Ottens, 1988. 1988. New York Times. https://www.nytimes.com/2021/03/11/arts/music/lou-ottens-dead.html.

Sony. Sony Walkman TPS-L2. n.d. Sony.com. https://www.sony.com/ja/pressroom/pict_data/p_audio/1979_tpsl2.html.