共 18 条
[11]
STEVENS, 1942, Patent No. 2290602
[12]
STEVENS DR, 1942, Patent No. 2297588
[13]
STEVENS DR, 1943, Patent No. 2327938
[16]
Swern D., 1944, OIL SOAP, V21, P133
[17]
1947, Patent No. 2413972
[18]
1944, Patent No. 2349044