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A picture's worth : PECS and other visual communication strategies in autism /
by Bondy, Andy.
Publication:
Bethesda, MD : Woodbine House, 2001
. xii, 155 p. :
22 cm.
Date:2001
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(2),
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The picture exchange communication system training manual /
by Frost, Lori.
Publication:
Newark, DE : Pyramid Educational Products, 2002
. 396 p. ;
28 cm.
Date:2002
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(1),
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The Picture Exchange Communcation System (PECS) Training Manual
by Lori Frost and Andy Bondy
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(1),
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