AA. V. Buyer's guideA. V. Buyer's guidede Dugan LairdMateriasAudio-visual equipmentEdiciones (1)A. V. Buyer's guide (1973)National Audio-Visual AssociationMás obras de Dugan LairdAA user's look at the audio-visual worldA user's look at the audio-visual world1973Approaches to training and development1978Solving managerial problems; a workbook
