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1 |
The conquest of space Ley, Willy. - New York : Viking Press, 1950, 4. print
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2 |
The lungfish, the dodo [and] the unicorn Ley, Willy. - New York : Viking Pr., 1948, New ed., completely rev. and considerably enlarged
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3 |
Rockets Ley, Willy. - New York : Viking Pr., 1944
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4 |
Shells and shooting Ley, Willy. - New York : Modern Age Books, 1942
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5 |
The days of creation Ley, Willy. - New York : Modern Age Books, c 1941
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6 |
Coronet / Vol. 2, No. 3 = No. 9 1937
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