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Elmer Riggs, the first curator of Fossil Mammals (wearing cap) and field laboratory assistant Harold W. Menke preparing Grand Junction Colorado fossils including the Brachiosaurus femur still in plaster jacket at left. Paleontology Laboratory, Field Columbian Museum.Credit Information:Neg. # CSGEO3251cPhotographer: unknown

Photographer(s):Admin(c) (c) Field Museum of Natural History