000
002730000a22001210004500
245
_a
Intergovernmental conference on environmental education
110
_a
UNESCO
260
_a
Paris
_c
1977
300
_a
101 p.
080
_a
577.4:37
_b
U6
041
_a
EN
942
_c
BK
999
_c
102035
_d
102035