The stratigraphical paleontology of the Tertiary non-marine sediments of EcuadorPublished in Bulletin of Carnegie Museum of Natural History, in 1982, in volume 19, pages 1-53Phalli of Recent genera and species of the family Geomyidae (Mammalia: Rodentia)Published in Bulletin of Carnegie Museum of Natural History, in 1982, in volume 20, pages 1-62
Phalli of Recent genera and species of the family Geomyidae (Mammalia: Rodentia)Published in Bulletin of Carnegie Museum of Natural History, in 1982, in volume 20, pages 1-62