G.R. Chhatwal

• Textbook of Biotechnology
• Encyclopaedia Dictionary of the Environment
• Encyclopaedia of Biotechnology
• Objective Chemistry
• Dictionary of Environment Chemistry
• Encyclopaedia of Environmental Pollution and Its Control
• Encyclopaedia of Scientific and Technical Terms
• Encyclopaedia of World Great Scientists
• Encyclopaedic History of Science and Technology
• Environmental Water Pollution and Its Control
• History of Biology, Vol. 1-4
• History of Physics - 4 Vols