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You searched for: Author/Creator Rivera, Nelson A.- Rivera, Nelson A. [remove] 4
- Environmental chemistry -- Periodicals 2
- 362.1 1
- 363.7363 1
- 507.1 1
- 615.902 1
- Agricultural education -- Periodicals 1
- Biological monitoring -- Periodicals 1
- Coal ash -- Trace element -- Periphyton -- Mayfly -- Accumulation 1
- Environmental monitoring -- Periodicals 1
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