共 18 条
- [2] BURNS PY, 1952, 57 YAL U SCH FOR
- [3] Dudich E., 1952, Acta Biologica Budapest, V3, P295
- [4] Harshberger JW., 1916, VEGETATION NEW JERSE
- [6] LEE LL, 1923, USDA BUR SOILS, P659
- [8] LITTLE S, 1946, 2 FOR STA FOR MAN PA
- [10] LUTZ HJ, 1934, 38 YAL U SCH FOR B