000
002940000a22001210004500
245
_a
Bibliography of publications designed to raise the standard of scientific literature
110
_a
UNESCO
260
_a
Paris
_c
1963
300
_a
83 p.
080
_a
016
_b
U6
041
_a
EN
942
_c
BK
999
_c
96794
_d
96794