TY  - SER
AU  - Diffendal,R.F.Jr
TI  - Regional implications of the geology of the Ogallala group (upper Tertiary) of southwestern Morrill County, Nebraska, and adjacent areas
SN  - 00167606
KW  - Géologie régionale
KW  - Tertiaire sup
KW  - Erosion
KW  - Groupe Ogallaba
KW  - Etats Unis
KW  - Nebraska
N1  - <Donation ORSTOM>; bibliogr. p. 976
ER  -