1. Stratigraphy of part of the lunar near side Author/Creator: Wilhelms, Don E. Publication/Creation: Washington : U.S. Govt. Print. Off, 1980 Resource Type: Book Is Part Of: U.S. Geological Survey professional paper, no. 1045-1047. Access & Availability: Loading
2. Summary of lunar stratigraphy -- telescopic observations, Author/Creator: Wilhelms, Don E. Publication/Creation: Washington : U.S. Govt. Print. Off, 1970 Resource Type: Book Is Part Of: U.S. Geological Survey professional paper, no. 595-599. Access & Availability: Loading