'; ?>
click to enlarge
1 1946 San Juan Basin G.G. Simpson G.O. Whitaker A.R. Simpson p. 2 Specimens 18 Levels 21 Localities 25 Notes on particular localities 35 Sediments - Stratigraphy 51 Nature of Occurrence of Fossils 71 Dates, itinerary 74 List of aerial mosaics 75 Notes on aeral mosaic quadrangles