Spenger, Osgar F. <br/><br/>
Secondary recovery of oil/ 
Osgar F. Spenger. 
 - Pennsylvania:  The Pennsylvania State College,  c1949. 
 - vii,441 p.:  23 cm. 
<br/><br/>
<br/><br/><br/>English 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Petroleum<br/>Secondary recovery of oil
<br/><br/><label>Dewey Class. No.: </label>622.338/SPS