Before This Decade Is Out Dover Books on Astronomy
Glen E. Swanson is a historian at Johnson Space Center in Houston. He is also the editor of Countdown,a publication devoted to the space shuttle, and Quest,a periodical on the history of space flight.
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Mine gases and ventilation: textbook for students of mining, mining engineers and candidates preparing for mining examinations designed for working ... the safe and efficient operation ... [ 1920 ]