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The effective use of audio visuals/

by Willis, Cynthia Enid,
Published by : Ministry of Agriculture, Agricultural Communication Office, ([Georgetown] : ) Physical details: 24 p. : ill. Subject(s): Communication in agriculture -- Audiovisual aids. | Communication in agriculture -- Guyana. | Agriculture -- Audio-visual aids. -- study & teaching Year: 1977
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c/c 107561

c/c 107562

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