Clayton quadrangle (CLA) /
compiled and edited by Nenad Spoljaric, with contributions by the Delaware Geological Survey staff.

APA Citation

Spoljaric, N., Delaware Geological Survey. (1988). Clayton quadrangle (CLA). [Dover?]: State of Delaware, University of Delaware, Delaware Geological Survey.

MLA Citation

Spoljaric, Nenad, and Delaware Geological Survey. Clayton Quadrangle (CLA). [Dover?]: State of Delaware, University of Delaware, Delaware Geological Survey, 1988.

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