DARA, S. (1987). A T B OF ENVIRONMENTAL CHEMISRTRY & POLUTION CONTROL. MCGRAW HILL.
Lua i Stíl Chicago (17ú heag.)DARA, S.S. A T B OF ENVIRONMENTAL CHEMISRTRY & POLUTION CONTROL. NEW-YORK: MCGRAW HILL, 1987.
Lua MLA (9ú heag.)DARA, S.S. A T B OF ENVIRONMENTAL CHEMISRTRY & POLUTION CONTROL. MCGRAW HILL, 1987.
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