共 16 条
- [1] BLAISDELL JP, 1958, US DEP AGRIC TECH B, V1190, P1
- [2] COSTELLO DAVID F., 1939, U S DEPT AGRIC TECH BULL, V686, P1
- [3] DICKINSON CE, 1972, 139 COL STAT U IBP G
- [4] HUSS DL, 1964, GLOSSARY TERMS USED
- [5] JAMESON DA, 1969, 1USIBP COL STAT U GR
- [6] KLIPPLE G. E., 1960, U S DEPT AGRIC TECH BULL, V1216, P1
- [7] LAUENROTH WK, 1973, THESIS COLORADO STAT
- [10] MUEGGLER W F, 1972, U S Forest Service Research Paper INT, V124, P1