Rai, R.K. .
Environmental management / edited by R.K. Rai, A.C. Mohapatra, N.P. Goel. - Jaipur : Rawat Publication , 1992 - 2 vols :
81-7033-154-8 (set)
Environmental management
G:55(X:8) / N2.2;2
Environmental management / edited by R.K. Rai, A.C. Mohapatra, N.P. Goel. - Jaipur : Rawat Publication , 1992 - 2 vols :
81-7033-154-8 (set)
Environmental management
G:55(X:8) / N2.2;2