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All Fields
(("biological assessment" OR bioassess OR bioindicat) AND (aquatic OR "water quality")) NOT (toxicity OR histop OR bioaccum OR biomarker OR mitoch OR embryotox OR "muscle tissues" OR xenobio OR "toxic substances" OR bioassay OR food OR mitosis)
Remove constraint All Fields: (("biological assessment" OR bioassess OR bioindicat) AND (aquatic OR "water quality")) NOT (toxicity OR histop OR bioaccum OR biomarker OR mitoch OR embryotox OR "muscle tissues" OR xenobio OR "toxic substances" OR bioassay OR food OR mitosis)
Topic
Environmental monitoring
Remove constraint Topic: Environmental monitoring
Format
Book OR Microfilm
Remove constraint Format: Book <strong class='text-muted constraint-connector'>OR</strong> Microfilm
Publish Date
1996 OR 1997 OR 1998 OR 1999
Remove constraint Publish Date: 1996 <strong class='text-muted constraint-connector'>OR</strong> 1997 <strong class='text-muted constraint-connector'>OR</strong> 1998 <strong class='text-muted constraint-connector'>OR</strong> 1999