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The present invention provides one pair or two pairs of horizontal propellers incorporated on the two opposite sides of an aircraft, which propellers by their rotating external blades create through… Continue Reading
The present article shows the methodology of implantation of a quality guarantee program of medical attention through quality circles at the National Institute of Perinatology and it's results. Among… Continue Reading
OBJECTIVE The objective of this study was to determine the application of gender perspective in public health papers in four journals published by the Mexican National Health Institutes. MATERIAL… Continue Reading