Environmental Research Satellite (English Wikipedia)

William R. Corliss (1967). Scientific Satellites. Washington D.C.: Science and Technical Information Division, Office of Technology Utilization, NASA. p. 714. Retrieved 2022-03-12.

astronautix.com

Wade, Mark. "ERS". www.astronautix.com. Archived from the original on December 27, 2016. Retrieved 8 November 2021.
Wade, Mark, Encyclopedia Astronautica Midas Archived 2010-11-20 at the Wayback Machine

Rogerio Atem de Carvalho; Jaime Estela; Martin Langer, eds. (2020). "1.3". Nanosatellites: Space and Ground Technologies, Operations and Economics. Hoboken, NJ: Wiley. ISBN 9781119042068. OCLC 1126347525.
Ezell, Linda Neuman (1988). NASA Historical Data Book: Programs and projects, 1969-1978. Scientific and Technical Information Division, National Aeronautics and Space Administration. p. 402.

Heyman, Jos (2005-04-12). "OV". Directory of U.S. Military Rockets and Missiles. Designation Systems. Retrieved February 15, 2020.

Andrew LePage (2014-05-18). "Vintage Micro The Original Picosatellite". Drew ex Machina. Retrieved 2022-03-12.

"TETR-2 Is Successful Despite Faulty Battery Pack" (PDF). Technical Information Bulletin: The Manned Spaceflight Network. 8 (3). 26 February 1971. Retrieved 13 December 2021.

McDowell, Jonathan. "Satellite Catalog". Jonathon's Space Report. Retrieved 2022-03-12.

Thomas L. Branigan, ed. (December 1962). TRW Space Log. Vol. 2. Redondo Beach, CA: TRW. p. 45.
John B. Rittenhouse (January 1966). Space Materials Handbook: Space Materials Experience. Supplement 1, to the 2d. ed. NASA. pp. s-67 – s-68.
"A New Component of Gamma Rays Above One MEV Observed By The ERS-18 Satellite". Scientific and Technical Aerospace Reports. 8 (13). NASA: 2473–2474. 1968. Retrieved 2022-06-08.

Krebs, Gunter D. "TRS Mk. 1 (ERS)". Gunter's Space Page. Retrieved 25 October 2021.
Krebs, Gunter D. "TRS Mk. 2 (ERS)". Gunter's Space Page. Retrieved 25 October 2021.
Krebs, Gunter D. "ORS Mk.2 (ERS)". Gunter's Space Page. Retrieved 25 October 2021.
Krebs, Gunter D. "ORS Mk.3 (ERS)". Gunter's Space Page. Retrieved 25 October 2021.
Krebs, Gunter D. "OV5 (ERS)". Gunter's Space Page. Retrieved 25 October 2021.
Krebs, Gunter D. "TTS, TETR (ERS)". Gunter's Space Page. Retrieved 26 October 2021.

Wade, Mark. "ERS". www.astronautix.com. Archived from the original on December 27, 2016. Retrieved 8 November 2021.
"Astronautical and Aeronautical Events of 1962" (PDF). NASA. 1963. p. 236. Archived from the original (PDF) on 2013-03-04. Retrieved 2022-04-11.
Wade, Mark, Encyclopedia Astronautica Midas Archived 2010-11-20 at the Wayback Machine