Stratigraphy of the Cretaceous rocks and the Tertiary Ojo Alamo Sandstone, Navajo and Hopi Indian reservations, Arizona, New Mexico, and Utah / 
by R. B. O'Sullivan...[et al.]. 
 -- Washington :   United States Government Printing Office,   1972 
 - 65 p. + map. -- 
 (Geological Survey Professional Paper  ;  521-E).
<br/><br/><label>Subjects--Topical Terms: </label><br/>Arizona<br/>Cretácico<br/>Estratigrafía<br/>Nuevo Mexico<br/>Utah
<br/><br/><label>Universal Decimal Class. No.: </label>551.7(789+791/792)"6153"