11 books
Our Flag Number, with 1197 Flags in Full Colors and 300 Additional Illustrations in Black and White
National Geographic Volume 31
National Geographic Volume 32
The Book of Birds, Common Birds of Town and Country and American Game Birds
National Geographic Volume 35
National Geographic Volume 39
National Geographic Volume 36
National Geographic Volume 13
National Geographic Volume 38
Scientific Results of the Katmai Expeditions of the National Geographic Society. I-X
The Physiography of the United States; Ten Monographs