Van Alstine, David Ralph <br/><br/>
Apparent polar wandering with respect to North America since the late precambrian  [microform] / 
by David Ralph Van Alstine 
 - Ann Arbor, Mich. :  University Microfilms International,  1979 
 - 4 microfiches ;  11 x 15 cm. 
<br/><br/>Thesis (Ph.D.) - California Institute, 1979 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Polar wandering<br/>Geology, Stratigraphic--Paleozoic<br/>Geology, Structural