Planetary Observer program (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Planetary Observer program" in English language version.

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1thefreelibrary.com

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deseret.com

"NASA Picks Basic Spaceship Over Awesome Alternative". The Deseret News. Associated Press. November 6, 1992.
Hills, Bruce (February 25, 1990). "2 Satellites to Orbit Moon in '96, U. physicist says". The Deseret News. p. A1.
Rosenthal, Harry F. (May 12, 1990). "Mars Expedition Tab May Be Astronomical". The Deseret News. Associated Press.

doi.org

Eberhart, Jonathan (October 19, 1985). "New starts and tough choices at NASA". Science News. 128 (16): 250. doi:10.2307/3970053. JSTOR 3970053.

jstor.org

Eberhart, Jonathan (October 19, 1985). "New starts and tough choices at NASA". Science News. 128 (16): 250. doi:10.2307/3970053. JSTOR 3970053.

nytimes.com

Wilford, John Noble (March 7, 1989). "NASA Turns From Custom Design to Standard Models". The New York Times.
Broad, William J. (July 17, 1989). "New Phase on the Moon: U.S. Weighs a Return". The New York Times.

thefreelibrary.com

Eberhart, Jonathan (October 19, 1985). "New starts and tough choices at NASA". Science News. 128 (16): 250. doi:10.2307/3970053. JSTOR 3970053.