00628nam a22001817a 45000010005000000030010000050050017000150400014000320080041000460200018000871000021001052450121001262600065002473000011003126500045003236500041003686500037004095968MX-SIABUC20260702203512.0  aMX-SIABUC991231s        0000000             000 d  a0-674-27335-440aSeltzer, Leon E.0 aExemptions and fair use in copringht the exclusive Rights tensions in the 1976 Copyright Act/cby León E. Seltzer.4 aCambridge, Massachusetts :bHarvard University Press,c1978.4 a199 p.  a1.PROPIEDAD INTELECTUALz-ESTADOS UNIDOS  a2.DERECHOS DE AUTORz-ESTADOS UNIDOS  a3.DERECHO CIVILz-ESTADOS UNIDOS