Diffendal, R. F. Jr <br/><br/>
Regional implications of the geology of the Ogallala group (upper Tertiary) of southwestern Morrill County, Nebraska, and adjacent areas 

<br/><br/> <Donation ORSTOM> 
<br/><br/>bibliogr. p. 976 
<br/><br/><label>ISSN: </label>00167606 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Géologie régionale<br/>Tertiaire sup<br/>Erosion<br/>Groupe Ogallaba
<br/><br/><label>Subjects--Index Terms: </label>Etats Unis  Nebraska