Communication with Extraterrestrial Intelligence, Yerevan, 5- 11 Sept., 1971
Ergebnisse der Zweifrequenz-Funkwellendurchleuchtung der Mars-Ionosphaere mit Hilfe der Mars-2-Sonde
Design of an x-ray telescope system for an orbiting astronomical observatory
Fourier spectroscopy of interstellar sources on an infrared telescope explorer
Direction-finding measurements of type 3 radio bursts out of the ecliptic plane
Command and data handling of science signals on spacelab
A balloon-borne Ge(Li) spectrometer for gamma-ray astronomy
Survey of United States space science satellites for the physical sciences
The curved crystal X-ray spectrometer for the HEAO-B satellite