@misc{Knechtel_Maxwell_M._(1897-1984)_Bulletin,
 author={Knechtel, Maxwell M. (1897-1984)},
 copyright={Gdańsk University of Technology Library},
 howpublished={online},
 publisher={Government Printing Office.},
 language={eng},
 type={journal},
 title={Bulletin 874-B. Geology and fuel resources of the southern part of the Oklahoma coal field. Part 2, The Lehigh district coal, Atoka, and Pittsburg counties},
 keywords={geology, mineralogy, petrography, journals, United States of America},
}