共 9 条
[1]
MICHELL RL, 1957, Patent No. 2811518
[2]
MITCHELL RL, 1951, Patent No. 2542285
[3]
NIKITINE VM, 1957, REFEAT ZHUR KHIM, P527
[4]
NIKITINE VM, 1960, BONMAJNAIA PRONYCHLE
[5]
NIKITINE VM, 1965, BUM PROM, P6
[6]
RICHTER GA, 1932, Patent No. 1860432
[7]
RICHTER GA, 1939, Patent No. 2159676
[8]
ROBERT R, 1968, PAPER TRADE J, P49
[9]
ROWLING FG, 1939, Patent No. 2147618