| Title: | The Law of Diminishing Returns |
| Author: | Spillman, W. J. (William Jasper) |
| Author: | Lang, Emil |
| Note: | Yonkers-on-Hudson and Chicago: World Book Co., 1924 |
| Link: | page images at Cornell |
| Link: | page images at HathiTrust |
| Stable link here: | https://onlinebooks.library.upenn.edu/webbin/book/lookupid?key=olbp86445 |
| Subject: | Agriculture -- Economic aspects |
| Subject: | Diminishing returns |
| Subject: | Crop yields |
| Call number: | HD1411 .S6 |
| Other copies: | Look for editions of this book at your library, or elsewhere. |
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