@misc{Nickles_John_Milton_(1859-1945)_Bulletin,
 author={Nickles, John Milton (1859-1945)},
 howpublished={online},
 publisher={Government Printing Office.},
 language={eng},
 type={journal},
 title={Bulletin 834. Bibliography of North American Geology 1929 and 1930},
 keywords={geology, mineralogy, bibliography, journals, United States of America},
}