WATER: Harvesting, Purification & Distribution Management (3 Vols.)..

Encyclopaedia of Medicinal Plants (4 Vols.)..

Encyclopedia Natura Medica (4 Vols.)..

Encyclopaedia of Bioenergy Production and Management (2 Vols.)..

Hive Management and Beekeeping (2 Vols.)..

Encyclopaedia of Irrigation Systems & Management (2 Vols.)..

Encyclopaedia of Forest Management (6 Vols.)..

Encyclopaedia of Seed Technology (5 Vols.)..

Encyclopaedia of Plant Systematics (6 Vols.)..

The Encyclopaedia of Organic Agroforestry (3 Vols.)..

Organic Farming of Vegetables, Culinary Herbs and Flowers (3 Vols.)..

Encyclopedia of Organic Farming (6 Vols.)..

Encyclopaedia of Entomology (8 Vols.)..

Encyclopaedia of Parasitology (5 Vols.)..

Encyclopaedia of Vegetable Science (3 Vols.)..