共 4 条
[1]
EVANS, 1929, T AM I MINING MET EN, P7
[2]
MATHEWS, 1925, T AM I MINING MET EN, V71, P568
[3]
PFEIL L B, 1929, J IRON STEEL I, V169, P501
[4]
VERNON, 1928, BIBLIOGRAPHY METALLI