51 resultados para Aquatic pollutant
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Mode of access: Internet.
A classification of the larvae and puparia of the Syrphidae of Illinois, exclusive of aquatic forms.
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Issued also as thesis (PH.D.) University of Illinois.
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"August 1978."
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Sponsored by NOAA/National Ocean Service, National Marine Pollution Program Office.
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"November 1982."
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March 1980.
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Presented at the Olympia theater in conjunction with the Venice exhibit London International Exhibition.
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Mode of access: Internet.
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Mode of access: Internet.
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Made up set; supplied title.
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Leaves variously numbered.
The role of aquatic vascular plants in the eutrophication of selected lakes in western Massachusetts
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"A project supported under Section 100, Water resources research act of 1964 (p. L. 88-379."
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"Contract number 68-C9-0033 and Cooperative Agreement number CR-816862."
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Project 18050 DYC.