共 19 条
- [4] CLAUSEN J, 1948, CARNEGIE I WASHINGTO, V581, P1
- [5] CLAUSEN J, 1938, CARNEGIE I WASHINGTO, V37, P218
- [6] CLAUSEN J, 1941, CARNEGIE I WASH YB, V40, P160
- [7] CLAUSEN J, 1944, CARNEGIE I WASHINGTO, V43, P69
- [8] Clausen J., 1940, CARNEGIE I WASHINGTO, V520, P1, DOI DOI 10.1098/rspb.2012.2146
- [9] CLAUSEN JENS, 1939, AMER JOUR BOT, V26, P103, DOI 10.2307/2436717
- [10] Hitchcock AS, 1935, US DEP AGR MISCELLAN, V200, P1