共 13 条
- [1] DUNCAN D. P., 1958, FOREST SCI, V4, P71
- [2] FISKE WF, 1903, NEW HAMPHSIRE COLLEG, V6, P181
- [3] HOUGH AF, 1960, 139 NORTH FOR EXP ST
- [4] HOWARD LO, 1911, 91 USDA BUR ENT B
- [5] KULMAN H. M., 1964, FOREST SCI, V10, P258
- [6] KULMAN HM, 1962, 467 WEST VIRG AGR EX, P12
- [7] KULMAN HM, 1962, 467 WEST VIRG AGR EX, P3
- [8] KULMAN HM, IN PRESS
- [9] KULMAN HM, 1962, 467 WEST VIRG AGR EX, P8
- [10] LANGSTON ROBERT L., 1957, UNIV CALIFORNIA PUBL ENT, V14, P1