Cunningham, W., & Cunningham, M. A. (2004). Principles of environmental science: Enquiry and applications (2nd ed.). Tata McGraw-Hill.
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Chicago-čujuhus (17. p.)
Cunningham, William, juo Mary Ann Cunningham. Principles of Environmental Science: Enquiry and Applications. 2nd ed. New Delhi: Tata McGraw-Hill, 2004.
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MLA-čujuhus (9. p.)
Cunningham, William, juo Mary Ann Cunningham. Principles of Environmental Science: Enquiry and Applications. 2nd ed. Tata McGraw-Hill, 2004.
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