1883
Bibliografía (12 obras)
General biology
1945
1937
Human biology, with emphasis on eugenics
1933
I. Supplement to the flora of Barro Colorado Island, Panama
1929
I. Supplement to the flora of Barro Colorado island, Panama II. Two new species of Chara from tropical America
Sand dune plants of Kalamazoo County, Michigan
The ecology of Tehri Garhwal
1925
Distribution of the Umbellales in Michigan
1923
Forest formations and successions of the Sat Tal Valley, Kumaon, Himalayas
1921
Environmental influences on nector secretion ...
1917
Insect pollination of timberline flowers in Colorado
1916
Environmental influences on nectar secretion