@misc{Sears_Julian_Ducker_(1891-1970)_Bulletin,
 author={Sears, Julian Ducker (1891-1970)},
 copyright={Gdańsk University of Technology Library},
 howpublished={online},
 publisher={Government Printing Office.},
 language={eng},
 type={journal},
 title={Bulletin 860-A. Geology and fuel resources of the southern part of the San Juan Basin, New Mexico. Part 1, The coal field from Gallup Eastward toward Mount Taylor : with a measured section of Pre-Dakota (?) rocs near Navajo Church},
 keywords={geology, mineralogy, coal, journals, United States of America},
}