共 7 条
[1]
BODE H, 1928, BRAUNKOHLE, V27, P1070
[2]
Jeffrey E.C., 1924, MEM AM ACAD ARTS, V15, P1
[3]
POTONIE R, 1920, MIKROSKOPISCHE NACHW
[4]
STACH E, 1928, KOHLENPETROGRAPHISCH
[5]
1931, HELV, V14, P62
[6]
1931, HELV, V14, P58
[7]
1928, ANN, V461, P103