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Photo from U.S. Geological Circular 1225--The Quality of Our Nation's Waters--Nuttients and Pesticides

Graph shoiwng organochlorine pesticide
trends in sediment cores from White Rock Lake.

ORGANOCHLORINE PESTICIDE TRENDS IN SEDIMENT CORES FROM WHITE ROCK LAKE IN DALLAS, TEXAS, 1996 .^{(13-16,48-50)}