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1.
Environmental guidelines for development roads in the subarctic / Frederick B. Lotspeich and Austin E. Helmers by Series: Ecological research series
Material type: Text Text; Format: print ; Literary form: Not fiction
Language: English
Publication details: Oregon : United States Government Printing Office, 1974
Availability: Items available for loan: National Library of India (1)Call number: U.S 333.714 L 91 en.

2.
Environmental guidelines for development roads in the subarctic / Frederick B. Lotspeich and Austin E. Helmers by Series: Ecological research series
Material type: Text Text; Format: print ; Literary form: Not fiction
Language: English
Publication details: Oregon : United States Government Printing Office, 1974
Availability: Items available for loan: National Library of India (1)Call number: U.S 333.714 L 91 en.

3.
Low winter dissolved oxigen in some Alaskan rivers / by Eldor W.Schallock and Frederick B. Lotspeich by Series: Ecological Research Series
Material type: Text Text; Format: print ; Literary form: Not fiction
Language: English
Publication details: Washington, D.C. : United States Environmental Protection Agency, 1974
Availability: Items available for loan: National Library of India (1)Call number: U.S 553.9409798 Sc 11.

                                                                           
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