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| 001 | 140725 | ||
| 003 | PUCPR | ||
| 005 | 20260902165636.0 | ||
| 008 | 900124d1975||||dcuwr s r 0uuu 0eng d | ||
| 040 | _aPUCPR | ||
| 245 | 0 | 0 | _aPerspective. |
| 260 | 0 |
_aWashington, D.C. _c1975. |
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| 264 | 1 |
_aWashington, D.C. : _bAssociation for Educational Communications and Technology, _c1975. |
|
| 300 |
_avolumes : _billustrations (black and white) ; _c28 cm. |
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| 336 | _atxt | ||
| 337 |
_2rdamedia _an |
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| 338 |
_2rdacarrier _anc |
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| 610 | 0 |
_aAssociation for Educational Communications and Technology. _955516 |
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| 651 | 0 |
_aPuerto Rico _xPeriodicals. _2Local _9155382 |
|
| 710 |
_aAssociation for Educational Communications and Technology. _955516 |
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| 942 |
_2ddc _c22 |
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| 999 |
_c118300 _d118300 |
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