What happened to the coal forests during pennsylvanian glacial phases?

Chicago citation style
Falcon-Lang, Howard J, Dimichele, William A. What happened to the coal forests during pennsylvanian glacial phases?. 2010. Retrieved from the Digital Public Library of America, http://collections.si.edu/search/results.htm?q=record_ID%3ASILSRO_92294&repo=DPLA. (Accessed November 22, 2018.)
APA citation style
Falcon-Lang, Howard J, Dimichele, William A, (2010) What happened to the coal forests during pennsylvanian glacial phases?. Retrieved from the Digital Public Library of America, http://collections.si.edu/search/results.htm?q=record_ID%3ASILSRO_92294&repo=DPLA
MLA citation style
Falcon-Lang, Howard J, Dimichele, William A. Retrieved from the Digital Public Library of America <http://collections.si.edu/search/results.htm?q=record_ID%3ASILSRO_92294&repo=DPLA>.
Note: These citations are programmatically generated and may be incomplete.