共 44 条
[31]
SCHOLL W, 1927, Patent No. 297086
[32]
SCHOTTE, 1931, Patent No. 180859
[33]
SCHULKE, 1912, Patent No. 268780
[34]
STEVENS, 1942, Patent No. 2290603
[35]
STEVENS, 1942, Patent No. 2290602
[36]
STEVENS DR, 1942, Patent No. 2297588
[37]
TERRISSE, 1913, Patent No. 463221
[38]
TERRISSE, 1913, CHEM ZTG, V37, P394
[39]
TERRISSE, 1912, Patent No. 267210
[40]
WEINRICH, 1943, IND ENG CHEM, V35, P264