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Guidelines for studies of contaminants in biological tissues for the National Water-Quality Assessment Program

Call Number: TD 427 .O7 C76 1993
Methods for collecting algal samples as part of the National Water-Quality Assessment Program

Call Number: QK 564 .P67 1993
Guidelines for the processing and quality assurance of benthic invertebrate samples collected as part of the National Water-Quality Assessment Program

Call Number: QH 91.8 .B4 C84 1993
Methods for collecting benthic invertebrate samples as part of the National Water-Quality Assessment Program

Call Number: QH 91.8 .B4 C85 1993
Methods for sampling fish communities as part of the National Water-Quality Assessment Program

Call Number: SH 329 .F56 M43 1993