LEY, HENRY A., ed.
Geology of natural gas, by R. B. Harkness & others.
LEY, HENRY A., ed. Geology of natural gas, by R. B. Harkness & others. © 29Jun35; A84568. American Assn. of Petroleum Geologists, Inc. (PCW); 31Jan63; R309664.
American Assn. of Petroleum Geologists, Inc.|PCW