law of diminishing returns.
Series: New-World Agricultural Series, ed. by W.J. Spillman
Publisher: World Book Co.
Published: 1924
Place of publication: Yonkers-on-Hudson
Language: eng
Number of pages: 178
Subjects: Agriculture
Table of contents: value: Pt. 1. The law of the diminishing increment, by W.J. Spillman.- Pt. 2. The law of the soil, by Emil Lang.