000
00220nam a22000977a 4500
082
_a
620.41016
_b
UNE
245
_a
Appropriate technology
_c
UNESCO
260
_a
Bangkok:
_b
UNESCO,
_c
1978.
300
_a
v, 103p.
942
_c
BK
999
_c
151906
_d
151906