Schramm, Jacob Richard, 1885-  Schramm, Jacob Richard, 1885- <br/><br/>
Plant colonization studies on black wastes from anthracite mining in Pennsylvania / 
[by] J.R. Schramm. 
 - Philadelphia :  American Philosophical Society,  1966. 
 - Transactions of the American Philosophical Society. New ser. ;  v. 56, pt. 1 .
<br/><br/>Bibliography: p. 185-189. 
<br/><br/><label>LCCN: </label>66018700 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Botany -- Pennsylvania.--Botany -- Pennsylvania.<br/>Plant ecology.<br/>Strip mining.
<br/><br/><label>LC Class. No.: </label>Q11  / .P6 n.s., vol. 56, pt. 1 
<br/><br/><label>Dewey Class. No.: </label>581.509748