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Overcoming medical scholasticism in New Spain: experience and indigenous knowledge in Arias de Benavides' treatment of syphilis. [PDF]
Méndez Alonzo M, Villanueva LA.
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Effectiveness of menstruation and fertility tracking technology in childbearing women: a scoping review. [PDF]
Li Y, Fang Y, Gu S.
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[Portable ultraviolet irradiation device as a teaching tool to improve handwashing in nursing students]. [PDF]
Gómez de Quero Córdoba M +7 more
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Recursos de agua dulce y calidad del agua
1992Varias estimaciones indican que de toda el agua del planeta un 94% es agua salada en los oceanos y un 6% agua dulce. De esta ultima, aproximadamente un 27% esta en glaciares y un 72% es subterranea. Esto deja en cualquier momento dado menos de un 1% del agua dulce en la atmosfera o en corrientes y lagos (1).
Mostafa K Tolba
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