000 | 003250000a22001330004500 | ||
---|---|---|---|
245 | _aAppropriate technologies for developing countries | ||
100 | _aEckaus, R.S. | ||
260 |
_aWashington _bNAS _c1977 |
||
300 | _axiii, 140p. : ill. | ||
020 | _a0309026024 | ||
080 |
_a62.001.8 _bE3 |
||
041 | _aEN | ||
942 | _cBK | ||
999 |
_c109889 _d109889 |