1. A photometric technique for determining planetary slopes from orbital photographs Author/Creator: Bonner, W. J., author Publication/Creation: Washington : United States Department of the Interior, Geological Survey, 1973 Resource Type: Book Access & Availability: Loading
2. A photometric technique for determining planetary slopes from orbital photographs, Author/Creator: Bonner, W. J. Publication/Creation: Washington : U.S. Govt. Print. Off, 1973 Resource Type: Book Is Part Of: U.S. Geological Survey professional paper, no. 809-812. Access & Availability: Loading