@misc{Bowen_Charles_F._(1871-1953)_Bulletin,
 author={Bowen, Charles F. (1871-1953)},
 howpublished={online},
 publisher={Government Printing Office.},
 language={eng},
 title={Bulletin 661-I. Phosphatic oil shales near Dell and Dillon, Beaverhead County, Montana},
 type={czasopismo},
 keywords={geologia, mineralogia, czasopisma, Montana (Stany Zjednoczone ; stan)},
}