Amateur scientists, the international geophysical year, and the ambitions of Fred Whipple.
Haubold
Hans J
HJ
D005118:Extraterrestrial Environment; D049673:History, 20th Century; D049674:History, 21st Century; D006801:Humans; D012586:Science / Q000266:history* / Q000639:trends; D018531:Spacecraft / Q000266:history