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Application of the Law of Diminishing Returns to Some Fertilizer and Feed Data

 

作者: W. J. Spillman,  

 

期刊: American Journal of Agricultural Economics  (WILEY Available online 1923)
卷期: Volume 5, issue 1  

页码: 36-52

 

ISSN:0002-9092

 

年代: 1923

 

DOI:10.2307/1230266

 

出版商: Oxford University Press

 

数据来源: WILEY

 

 

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