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EFFECT OF DIURNAL FREEZE-THAWING ON SURVIVAL AND GROWTH OF SELECTED BACTERIA
Manned mars exploration in the unfavorable time period /1975-1985/
Nasa to begin unmanned mars exploration this year /a fact sheet/ news release no. 64-205
A study of manned mars exploration in the unfavorable time period /1975-1985/
Integration of Moon and Mars programs in the 21st century : Problem, definition and approach
Benefit estimating relationships for the evaluation of extraterrestrial facilities
A re-evaluation of w. h. wright's plates of the 1924 and 1926 oppositions of mars.