Hubble Space Telescope :
cycle 2 call for proposals.

APA Citation

Space Telescope Science Institute (U.S.)., European Space Agency., United States. National Aeronautics and Space Administration. (1990). Hubble Space Telescope: cycle 2 call for proposals. [Baltimore, Md.]: The Institute.

MLA Citation

Space Telescope Science Institute (U.S.), European Space Agency, and United States. National Aeronautics and Space Administration. Hubble Space Telescope: Cycle 2 Call for Proposals. [Baltimore, Md.]: The Institute, 1990.