Search Results for the EPA National Library Catalog

Items Found: 7

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Your Search: (AUTHOR=Cummins AND Richard.)

 
 
 

Select Item Title Year Published
An analysis of survey data on the chemistry of twenty-three streams in the Chesapeake Bay watershed : some implications of the impact of acid deposition / 1983
An Introduction to the aquatic insects of North America / 1984
Heartsaver AED for the lay rescuer and first responder : adult cardiopulmonary resuscitation and automated external defibrillation / 1998
Introduction to the aquatic insects of North America 1996
Introduction to the aquatic insects of North America 1978
Organism-substrate relationships in streams : a symposium held at the Pymatuning Laboratory of Ecology on July 16 and 17, 1964 / 1966
Studies on the aquatic ecology of the upper Ohio River system 1965

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