000
00241 a2200109 4500
080
_a
544.4
_b
H 491 M
245
1
_a
Methods of gas analysis
_c
by W. Hempel
260
_c
1912
650
_a
Gas Analysis
100
1
_a
Hempel, W.
_d
901
_a
16704
999
_c
27167
_d
27167