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Impact of educational television on young children / edited by Wayne H. Holtzman and Isabel Reyes-Lagunes, in collaboration with Mira Aghi ... [et al.].
- 372.13358 I341
- UNESCO ; distributed by [Unipub],
- 1981.
- Paris : [New York, N.Y. :
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Producción de biogas a partir de pulpa de café : biogas, energÃa a partir de desechos agroindustriales / Ana Isabel Morales C., Gerardo Chacon V.
- 876.6
- Centro de investigaciones en café (CICAFE). Oficina del café,
- 1981.
- San José :