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Comprehension of pictorial messages on corn production by literate, semi-literate and illiterate farmers in central Veracruz, Mexico

Thesis (Ph. D.)--University of Wisconsin--Madison, 1970. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.

Identiferoai:union.ndltd.org:OCLC/oai:xtcat.oclc.org:OCLCNo/609274006
Date January 1970
CreatorsMartínez Valdés, Gregorio,
Source SetsOCLC
LanguageEnglish
Detected LanguageEnglish

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