Bulletins. 1260-L, M. Summary report on geology and mineral resources of: Harney Lake and Malheur Lake areas of Malheur National Wildlife Refuge, Northcentral Harney County, Oreg.; Poker Jim Ridge and Fort Warner areas of Hart Mountain National Antelope Refuge, Lake County, Oreg. [with lists of references cited], by George W. Walker and Donald A. Swanson.