1. Argus-Astronet Report;Argus/Astronet;Rept. No. 1-15-66,1966
2. Some systematic visual lunar observations;Arthur;Commun. Lunar and Planet Lab.,1962
3. Rilles, wrinkles, and faults;Baldwin,1963
4. Geomagnetic planetary indices Kp, Ap, and Cp, 1932–1961;Bartels;IAGA Bull.,1962
5. Aristarchus. The violet glare;Bartlett;Strolling Astronomer,1967