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Marketing channels and margins for milk in the province of Sugamuxi (Boyacá)

open access: yesAgronomía Colombiana, 2011
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Tellez Iregui Gonzalo   +2 more
doaj  

A spread sheet model for planning farm machinery operations. l. model description and construction Modelo de hoja electrónica para el planeamiento de operaciones de mecanización agrícola. descripción y construcción del modelo

open access: yesAgronomía Colombiana, 1990
This paper describes the methodology in building up a spreadsheet model which allows to predict machinery and labour requirements and costs. The main characteristics of the model are presented including the required information, suggesting different ...
Leiva Fabio R.
doaj  
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The OI 989 and 1173 Å multiplets in the dayglow

Planetary and Space Science, 1988
Robert Meier
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The OI 989‐Å tropical nightglow

Geophysical Research Letters, 1984
Stan S Solomon
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