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open access: yesRevista de Educación Matemática, 2002
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[Strategy for improving the distress level in healthcare workers]. [PDF]

open access: yesRev Med Inst Mex Seguro Soc
Chávez-Reyes B   +11 more
europepmc   +1 more source

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open access: yesRevista de Educación Matemática, 1997
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open access: yesRevista de Educación Matemática, 2015
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