Spellman, F. R. (1996). Stream ecology and self-purification: An introduction for wastewater and water specialists. Technomic Publication.
Παραπομπή σε μορφή Chicago (17η εκδ.)Spellman, Frank R. Stream Ecology and Self-purification: An Introduction for Wastewater and Water Specialists. Lancaster: Technomic Publication, 1996.
Παραπομπή σε μορφή MLA (9th εκδ.)Spellman, Frank R. Stream Ecology and Self-purification: An Introduction for Wastewater and Water Specialists. Technomic Publication, 1996.
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