1. The international planetary patrol program;Baum;Icarus,1970
2. Blue haze and the Mariner 6 pictures of Mars;Boyce;Science,1970
3. Colorimetry of Martian features by means of area scanning;Boyce,1971
4. The Mars 1964–1965 apparition;Capen;Jet Propulsion Lab., Calif. Inst. Technol. Tech. Rept. 32-990,1966
5. Variation in atmospheric transparency of Mars in 1939;Martz;Publ. Astron. Soc. Pacific,1954