000
00246 a2200097 4500
082
_a
662.62
_b
Un3i
245
1
_a
INTERNATIONAL CLASSIFICATION OF HARD COALS BY TYPE
260
_a
Geneva
_b
United Nations
_c
1956
964
_g
CIRC
997
_a
19142 s C
999
_c
452137
_d
452137