Map of land modified by man in part of the Valencia 7 1/2-minute Quadrangle, Allegheny County and vicinity, Pennsylvania

1974 ◽  
Author(s):  
John S. Pomeroy
Keyword(s):  
Author(s):  
Talia M. Quandelacy ◽  
Shanta Zimmer ◽  
Justin Lessler ◽  
Charles Vukotich ◽  
Rachel Bieltz ◽  
...  

2003 ◽  
Vol 42 (1) ◽  
pp. 117-124 ◽  
Author(s):  
Rimei Nishimura ◽  
Janice S Dorman ◽  
Zsolt Bosnyak ◽  
Naoko Tajima ◽  
Dorothy J Becker ◽  
...  

1944 ◽  
Vol 9 (6) ◽  
pp. 705
Author(s):  
T. Earl Sullenger ◽  
Bertram J. Black ◽  
Aubrey Malloch

Circular ◽  
1975 ◽  
Author(s):  
Reginald Peter Briggs ◽  
John S. Pomeroy ◽  
William E. Davies
Keyword(s):  

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