China. Nung tsʻun fu hsing wei yüan hui

• Buko beishi chōsa
• Chinkō beishi chōsa
• Chūgoku nōgyō no kaishin
• Ho-nan shêng nung tsʻun tiao chʻa
• Kōsei ryōshoku chōsa
• Shan-hsi shêng nung tsʻun tiao chʻa
• Shanhai beishi chōsa