Environmental Geography: Influences on Man on the Basis of Ratzel’s System (2 Vols.)..

Environmental Management & Designs for the Sustainable Development (2 Vols.)..

Sustainable Bio-medical Waste Management (2 Vols.)..

Encyclopaedia of Hazardous Waste Management (6 Vols.)..

Encyclopaedia of Environmental Emission Management (5 Vols.)..

Encyclopaedia of Air Pollution Control Technology (3 Vols.)..

Clean Development Mechanism and Emission Trading (2 Vols.)..

Environmental Monitoring and Analysis (2 Vols.)..

Encyclopaedia of Analytical Geometry (3 Vols.)..

Solid Geometry (3 Vols.)..

Encyclopaedic Textbook of Modern Algebra (4 Vols.)..

Ency of Statistics (6 Vols.)..

Comprehensive Differential Equations (3 Vols .)..

Chemistry of Representative Elements (2 Vols.)..

Encyclopaedia of Scientific Terms (6 Vols.)..