共 5 条
[1]
POZIN ME, 1974, TEKHNOLOGIYA MINERAL, P1310
[2]
TIKHOMIROV VK, 1983, PENY TEORIYA PRAIKTI
[3]
1970, Patent No. 3518072
[4]
1971, Patent No. 2070192
[5]
1968, Patent No. 3416910