James Sholto Douglas

1920

• Beginner's guide to hydroponics
• Forest Farming
• Hydroponics
• Advanced guide to hydroponics (soilless cultivation)
• Advanced guide to hydroponics (soilless cultivation)
• Alternative foods
• Beginner's guide to hydroponics
• Beginners guide to hydroponics
• Hydroponics
• Hydroponics: the Bengal system