The use of visual aids for training and instructional purposes

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110 2 ‡aInternational Labour Office.
245 1 4 ‡aThe use of visual aids for training and instructional purposes. ‡c Paper prepared by the International Labour Office.
260 ‡aGeneva, ‡c1955.
300 ‡a14 p. ‡c29 cm.
500 ‡aAt head of title: International Labour Organisation. Petroleum Committee. 5th sess., Caracas, 1955.
538 ‡aMode of access: Internet.
650 0 ‡aAudio-visual education
710 2 ‡aInternational Labour Organisation. ‡bPetroleum Committee.
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