其他書名 | By Mark P. Connaughton and Jack L. Hough, in Cooperation with South Carolina Agriculture Experiment Station, Clemson, S.C. |
出版 | United States Department of Agrilture, Soil Conservation Service, 1940 |
URL | http://books.google.com.hk/books?id=ozmD0AEACAAJ&hl=&source=gbs_api |