共 25 条
[21]
PENNELL FW, 1951, ILLUSTRATED FLORA PA, V3
[22]
PURER EDITH A., 1942, ECOL MONOGR, V12, P81, DOI 10.2307/1948423
[23]
WEIR WW, 1963, BIBLIOGRAPHY SOIL LA
[24]
1954, 60 US SAL LAB STAFF
[25]
1972, SOUTHERN CALIFORNIA