Purohit, S. K.
Chemical and biological methods of water and air pollution control : A practical hygiene manual / S. K. Purohit - India : Agro botanical, c1985. - VI, 59 p. : ill. ; 16 cm.
Biological methods.
Chemical.
628.16836 / PUC
Chemical and biological methods of water and air pollution control : A practical hygiene manual / S. K. Purohit - India : Agro botanical, c1985. - VI, 59 p. : ill. ; 16 cm.
Biological methods.
Chemical.
628.16836 / PUC