开放图书详细信息
| Smithsonian Libraries contributed to BHL | ||
| Guide to the study of insects and a treatise on those injurious and beneficial to crops, for the use of colleges, farm-schools, and agriculturists, by A. S. Packard, jr., M. D. With fifteen plates and six hundred and seventy wood-cuts. | ||
| Packard, A. S. (Alpheus Spring), 1839-1905 | ||
| keywords: Insects; Beneficial insects; Insect pests; | ||
| Subject:植物学 | ||
| 美国 | ||