(1951). Fluctuations in crops and weather 1866-1948.
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芝加哥风格引文
Fluctuations in Crops and Weather 1866-1948. Washington, 1951.
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MLA引文
Fluctuations in Crops and Weather 1866-1948. 1951.
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警告：这些引文格式不一定是100％准确.