Effects of gravel mining

Chicago citation style
Effects of gravel mining. 1950. Retrieved from the Digital Public Library of America, http://heritage.sonomalibrary.org/cdm/ref/collection/p15763coll2/id/14427. (Accessed December 13, 2018.)
APA citation style
(1950) Effects of gravel mining. Retrieved from the Digital Public Library of America, http://heritage.sonomalibrary.org/cdm/ref/collection/p15763coll2/id/14427
MLA citation style
Retrieved from the Digital Public Library of America <http://heritage.sonomalibrary.org/cdm/ref/collection/p15763coll2/id/14427>.
Note: These citations are programmatically generated and may be incomplete.