1. Geology of the middle Tertiary formations of Puerto Rico Author/Creator: Monroe, Watson Hiner, 1907-1992, author Publication/Creation: Washington : United States Department of the Interior, Geological Survey, 1980 Resource Type: Book Access & Availability: Loading
2. Geology of the middle Tertiary formations of Puerto Rico : a description of the stratigraphy and structure of Oligocene and Miocene age near the northern and southern coasts of Puerto Rico Author/Creator: Monroe, Watson Hiner, 1907-1992 Publication/Creation: Washington : U.S. Govt. Print. Off, 1980 Resource Type: Book Is Part Of: U.S. Geological Survey professional paper, no. 953-954. Access & Availability: Loading