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＜図書＞
Pictorial symbols / designed and copyrighted by Pictograph Corporation.

版	2nd enlarged edition.
出版者	New York : Pictograph Corporation
出版年	c1943.
大きさ	69 p. : ill. ; 22 cm.
著者標目	Pictograph Corporation
件　名	Signs and symbols Statistics -- Graphic methods  全ての件名で検索
一般注記	Includes index.

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