其他書名 | Schafer, E[dwin] G[eorge] ; P. 1. Effect of crop rotations on succeeding crops. By E. G. Schafer. P. 2. Effect of crop rotations on productivity of the soil. By L[awrence] C[lifford] Wheeting and S[ilvere] C[yril] Vandecaveye |
出版 | 1937 |
URL | http://books.google.com.hk/books?id=uSEruAAACAAJ&hl=&source=gbs_api |