@article{, recid = {234677}, title = {Manual for the certification of laboratories analyzing drinking water criteria and procedures, quality assurance. [microform] :}, publisher = {U.S. Environmental Protection Agency, Office of Water, Office of Ground Water and Drinking Water, Technical Support Center,}, address = {Cincinnati, Ohio :}, number = {EPA 815-B-97-001}, pages = {1 v. (loose-leaf) :}, year = {1997}, note = {Distributed to depository libraries in microfiche.}, url = {http://library.usi.edu/record/234677}, }