共 33 条
- [1] BEAL WJ, 1888, 27 BD AGR MICH, P74
- [2] BRIGGS LJ, 1900, USDA FIELD OPERATION, P418
- [3] BRIGGS LJ, 1897, USDA DIV SOILS B, V10
- [4] COWLES HC, 1901, B AM BUR GEOG, V2, P1
- [5] The physiographic ecology of Chicago and vicinity; A study of the origin, development, and classification of plant societies. Contributions from the Hull Botanical Laboratory. XXIV. [J]. BOTANICAL GAZETTE, 1901, 31 (1-6): : 73 - +
- [6] GAIN E, 1895, REV GEN BOT, V7, P71
- [7] GAIN E, 1895, REV GEN BOT, V7, P16
- [8] GAIN E, 1894, ANN SCI NAT BOT BIOL, V20, P65
- [9] GAIN E, 1895, REV GEN BOT, V7, P123
- [10] HEDGCOCK CG, 1902, BOT SURVEY NEBRASKA