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Add to basketpaperback. Condition: New. Paperback Pages Number: 234 Language: Chinese. Efficient duck technique a comprehensive and systematic introduction to all aspects of production of efficient duck. including: characteristics and varieties of duck. duck. construction and environmental control. duck breeding breeding. nutrition and feed of hatching eggs. duck. duck feeding and management. production and laying ducks feeding and management. duck foie gras production. production of duck down. duck health management and disease co.