Azolla geneseana, n. sp., and revision of Azolla primaeva - 1965
New plant microfossils from the Raritan Formation (Cretaceous) in New Jersey - 1966
A critical study of three Cretaceous salviniaceous megaspores - 1971
Upper Paleocene radiolarians from the Yamdrok mélange, south Xizang (Tibet), China - 2002
Cenozoic biostratigraphy of larger foraminifera from the Foz do Amazonas Basin, Brazil - 2003