共 8 条
[1]
DUNN WE, 1965, Patent No. 3376112
[2]
HENN JJ, 1970, 8450 US BUR MIN INF
[3]
HUGHES WH, 1965, Patent No. 992317
[5]
LATINA ZI, 1970, J APPL CHEM-USSR+, V43, P830
[6]
NELSON EW, 1959, Patent No. 3092456
[7]
SAWYER RH, 1948, Patent No. 2642339
[8]
WICKS CE, 1963, 605 US BUR MIN B