000
00259pam a2200109a 44500
082
_a
010
_b
UN25W
100
_a
Unesco
245
1
_a
WORLD GUIDE TO SCIENCE INFORMATION AND DOCUMENTATION SERVICES
260
_a
_b
Unesco
_c
964
_g
CIRC
997
_a
37159 C
999
_c
409908
_d
409908