EVIDENCIAS FISICAS DE PROCESOS QUIMICOS Y BIOQUIMICOS. EVIDENCIAS PEDAGOGICAS.
lunes, 20 de febrero de 2017
TODAY IS DAY OF PRESIDENTS IN OUR COUNTRY. SINCE 1971 UNITED STATES CELEBRATES WITH A FEDERAL HOLIDAY THE DAY OF THE PRESIDENTS. BY PROCLAMATION OF RICHARD NIXON THE THIRD MONDAY OF FEBRUARY IS THE DAY OF THE PRESIDENTS IN AMERICA.
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