著者名,書名,版表示,出版者名,出版年,シリーズ名,番号,ISBN,ISSN,URL
"Romberg, Frederick and Barnes, Virgil E. (Virgil Everett)","Correlation of gravity observations with the geology of the Coal Creek serpentine mass, Blanco and Gillespie Couties, Texas",,"University of Texas, Bureau of Economic Geology",1949,Report of investigations,,,,https://cir.nii.ac.jp/crid/1130282271839678976