Digging deeper into the Comstock :
guide for the Earth Science Week field trip, October 10 or 11, 2009 /
Nevada Bureau of Mines and Geology.

APA Citation

Nevada Bureau of Mines and Geology. Digging deeper into the Comstock: guide for the Earth Science Week field trip, October 10 or 11, 2009. [Reno: Nevada Bureau of Mines and Geology, 2009].

MLA Citation

Nevada Bureau of Mines and Geology. Digging Deeper Into the Comstock: Guide for the Earth Science Week Field Trip, October 10 Or 11, 2009. [Reno: Nevada Bureau of Mines and Geology, 2009],

Warning: These citations may not always be complete (especially for serials).