@misc{Erdmann._Charles_Edgar_(1897-1971)_Bulletin,
 author={Erdmann. Charles Edgar (1897-1971)},
 copyright={Gdańsk University of Technology Library},
 howpublished={online},
 publisher={Government Printing Office.},
 language={eng},
 type={journal},
 title={Bulletin 851. The book cliffs coal field in Garfield and Mesa Counties, Colorado},
 keywords={geology, mineralogy, coal, journals, United States of America},
}