Long-term chemical-quality changes in selected Delaware streams /
by Stuart W. McKenzie ; prepared by the United States Geological Survey in cooperation with the Delaware Geological Survey.

APA Citation

McKenzie, S. W., Delaware Geological Survey., Geological Survey (U.S.). (1979). Long-term chemical-quality changes in selected Delaware streams. Newark, Del.: State of Delaware.

MLA Citation

McKenzie, Stuart W, Delaware Geological Survey, and Geological Survey (U.S.). Long-term Chemical-quality Changes In Selected Delaware Streams. Newark, Del.: State of Delaware, 1979.

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