@misc{Mansfield_George_Rogers_(1875-1947)_Bulletin, author={Mansfield, George Rogers (1875-1947)}, howpublished={online}, publisher={Government Printing Office.}, language={eng}, title={Bulletin 727. Potash in the Greensands of new Jersey}, type={czasopismo}, keywords={geologia, mineralogia, czasopisma, New Jersey (Stany Zjednoczone ; stan)}, }