@misc{Burchard_Ernest_F._(1875-1961)_Bulletin, author={Burchard, Ernest F. (1875-1961) and Burchard, Ernest F. (1875-1961)}, copyright={GdaƄsk University of Technology Library}, howpublished={online}, publisher={Government Printing Office.}, language={eng}, title={Bulletin 821-C. Iron ore on Canyon Creek Fort Apache Indian Reservation, Arizona}, type={journal}, keywords={cartography, geology, iron, mineralogy, United States of America, journals}, }