Manual of environmental technology in developing countries
Ludwig, Harvey F
Manual of environmental technology in developing countries - New Delhi: South Asian Publishers Pvt. ltd., 1991 - 249p.
Environment
Development
R 502.2/.7(1-773) / N1.1
Manual of environmental technology in developing countries - New Delhi: South Asian Publishers Pvt. ltd., 1991 - 249p.
Environment
Development
R 502.2/.7(1-773) / N1.1