1. Carr, M.H ., Miscellaneous Geological Investigations Map I-723 1 (1971).
2. GREELEY, R, LUNAR HADLEY RILLE - CONSIDERATIONS OF ITS ORIGIN, SCIENCE 172: 722 (1971).
3. Howard, K. A., Miscellaneous Geological Investigations Map I-723 2 (1971).
4. UNPUBLISHED DATA
5. "Surface operational map of the Apennine-Hadley landing site Apollo 15 1971