Cockrell, Robert A. <br/><br/>
An anatomical study of eighty Sumatran woode  [microform] / 
Robert A. Cockrell 
 - Ann Arbor, Mich. :  University Microfilms International,  1941 
 - 1 microfilm reel :  positive ;  35 mm. 
<br/><br/>Thesis (Ph.D.) - University of Michigan, 1934 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Wood--Anatomy