00320nam a2200121Ia 4500008004100000041000800041084001300049100001600062245005400078260003600132653001400168653001600182160808s1956    xx            000 0 eng d  aeng  aF5552CC  aCren, L. C.  aPetroleum production engineering /cby L. C. Cren  aNew York :bMcGraw-Hill,c1956.  aPetroleum  aTyechnology