共 6 条
- [1] Curtis JT., 1959, VEGETATION WISCONSIN
- [2] GUMPF RE, 1962, THESIS U WISCONSIN
- [3] KIECKHEFER BJ, 1963, THESIS U ILLINOIS
- [4] NITSCH JP, 1964, REGULATEURS NATUR ED, P377
- [5] STERN KINGSLEY R., 1961, BRITTONIA, V13, P1, DOI 10.2307/2805282
- [6] Wareing PF, 1964, REGULATEURS NATURELS, P377