| 000 | 00664nam a2200193 a 4500 | ||
|---|---|---|---|
| 005 | 20210219160217.0 | ||
| 008 | 080926s1991 mx r 000 0 spa d | ||
| 035 | _aUPN01000161013 | ||
| 049 | _aUNE | ||
| 080 | _aOC 31:5:6 (100) =20 "1991" EST. | ||
| 245 | 0 | 0 | _aEstimation of world resources devoted to research and experimental development: 1980 and 1985 |
| 260 |
_aParis : _bUNESCO, _c1991. |
||
| 300 |
_aiii, 43 p.; _bcuadr. |
||
| 440 | 0 | _aCurrent studies and research instatistics | |
| 690 | _aEstadisticas cientificas | ||
| 690 | _aDesarrollo experimentales- Estadisticas cientificas | ||
| 710 | 2 | _aUNESCO. División de Estadisticas | |
| 905 | _aUNESCO | ||
| 999 |
_c133126 _d133126 |
||