Biblio
, 1977,
Foraminifera from outcrops of the Pierre Shale (Upper Cretaceous) of North Dakota: University of North Dakota.
, 1958, , 1984,
, 1964, UND-PC 3000 IMG_0638.pdf (454.44 KB)
Stratigraphy and sedimentary history of Middle Cenozoic (Oligocene and Miocene) deposits in North Dakota: University of North Dakota.
, 1973, , 2002,
, 1985,
Non-lignite marker beds in the Sentinel Butte formation, McKenzie Counties, North Dakota: University of North Dakota.
, 1990,
Silfer's M.S. thesis at the University of North Dakota.: University of North Dakota.
, 1990, Geology of northwestern McKenzie County, North Dakota: University of North Dakota.
, 1974, IMPORTANCE OF DIMORPHOSIPHON (CHLOROPHYTA, BRYOPSIDALES) FOR FACIES AND PALEOBIOGEOGRAPHIC STUDIES OF THE UPPER ORDOVICIAN RICHMONDIAN RED RIVER FORMATION, WILLISTON BASIN: Palaios, v. 27, p. 713-725, doi: 10.2110/palo.2011.p11-122r.
, 2012, , 1986,
, 1987,
, 1992,
, 1980,
Fresh water mollusks for the Grassy Butte area, McKenzie County, North Dakota: University of North Dakota.
, 1957, , 1981,
Applied geology in the Beulah-Hazen area, Mercer County, west-central North Dakota: University of North Dakota.
, 1979, Foraminifera from outcrops of the Niobrara Shale (Upper Cretaceous) of Emmons County, North Dakota: University of North Dakota.
, 1962, Bivalve associations of the Cannonball Formation (Paleocene, Danian) of North Dakota: University of North Dakota.
, 1984, , 2000,
, 1975,
, 1995,