Miscellaneous notes on fossil birdsPublished in Smithsonian Miscellaneous Collections, in 1958, in volume 135, issue 8, pages 1-11A review of the Middle and Upper Eocene primates of North AmericaPublished in Smithsonian Miscellaneous Collections, in 1958, in volume 136, pages 1-112
A review of the Middle and Upper Eocene primates of North AmericaPublished in Smithsonian Miscellaneous Collections, in 1958, in volume 136, pages 1-112