TY - RPRT TI - Data-collection methods and quality-assurance/quality-control procedures used in the study of episodic stream acidification and its effect on fish and aquatic invertebrates in four Catskill Mountain streams, New York, 1988-90 AU - Anthony J. Ranalli AU - Barry P. Baldigo AU - Debra Horan-Ross AU - Ronald V. Allen PY - 1997 DO - 10.3133/ofr93137 UR - https://pubs.usgs.gov/publication/ofr93137 ID - ofr93137 ER -