00775nas a2200229 a 4500 140725 PUCPR 20260902165636.0 900124d1975||||dcuwr s r 0uuu 0eng d PUCPR Perspective. Washington, D.C. 1975. Washington, D.C. : Association for Educational Communications and Technology, 1975. volumes : illustrations (black and white) ; 28 cm. txt rdamedia n rdacarrier nc Association for Educational Communications and Technology. 55516 Puerto Rico Periodicals. Local 155382 Association for Educational Communications and Technology. 55516 ddc 22 118300 118300 0 0 loc 0 evprrev 10 10 B 2016-05-27 0 Revista PR RevistaPR212718 2016-05-27 00:00:00 11 0 0 ddc 0 10 10 B 2026-09-02 Vol. 4, no. 2 0 2026-09-02 16:57:11 22 june 1975