Environmental concept /
Bera, Ajit Kumar.
Environmental concept / Ajit Kumar Bera. - 1st ed. - Calcutta, India : New Central Book Agency, 2013. - xiii, 179 p. : ill. ; 25 cm.
9788173814068 8173814066
Environmental Engineering.
628 / BEE
Environmental concept / Ajit Kumar Bera. - 1st ed. - Calcutta, India : New Central Book Agency, 2013. - xiii, 179 p. : ill. ; 25 cm.
9788173814068 8173814066
Environmental Engineering.
628 / BEE