1. Rainfed Agriculture in Asia and the Pacific;ADB,1989
2. Environmental and management factors affecting cropping intensity;Angus,1989
3. Influence of water-related factors on land preparation, cropping intensity and yield of rainfed lowland rice in central Luzon, Philippines;Bhuiyan,1979
4. The need for mechanization in dry seeded rice;Chakkaphak,1980
5. Technology development and the spread of direct seeded flooded rice in Southeast Asia;De Datta;Exp. Agric.,1986