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Evaluación de spots de radio y de la carta circular como medios masivos de información de tecnología agrícola.

by Nava Viloria, A; Martínez Valdés, G.
Publisher: 1976)Other Title: Evaluation of radio spots and circular letters as mass information media of agricultural technology].Subject(s): SPOTS DE RADIO | CARTA CIRCULAR | INFORMACION | TECNOLOGIA AGRICOLA In: Agrociencia (México) (no.23) p. 87-96.
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38 ref. Sum. (En, Es).

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