by Graham, A
Published in Vegetation and Vegetational History of Northern Latin America Papers (1973)

by Rzedowski, J
Published in Vegetation and Vegetational History of Northern Latin America Papers (1973)

by Gomez-Pompa, A
Published in Vegetation and Vegetational History of Northern Latin America Papers (1973)

by Breedlove, D.E
Published in Vegetation and Vegetational History of Northern Latin America Papers (1973)

by Porter, D.M
Published in Vegetation and Vegetational History of Northern Latin America Papers (1973)

by Dilcher, D.L
Published in Vegetation and Vegetational History of Northern Latin America Papers (1973)

by Bartlett, A.S, Barghoorn, E.S
Published in Vegetation and Vegetational History of Northern Latin America Papers (1973)

by Howard, R.A
Published in Vegetation and Vegetational History of Northern Latin America Papers (1973)