Simpson, R.S. Effective audio visual a user handbook - Focal press London 1987 - 215p. - Audiovisual Materials ISBN: 0-240-51524-5 Nat. Bib. No.: 4982 Nat. Bib. Agency Control No.: 659.148(02)SIM Subjects--Topical Terms: ManagementPublic relations Universal Decimal Class. No.: 659.148(02)