共 7 条
[1]
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[2]
FORSYTH, 1926, INT COM ILLUMINATION, V6, P100
[3]
GOODEVE, 1936, P ROY SOC A, V155, P664
[4]
SKOGLAND, 1929, BUR STAND MISC PUBL, V86
[6]
WRIGHT, 1936, P PHYS SOC LOND, V48, P401