NIST Calibration Services for Liquid VolumeVern Bean, Pedro Espina, John Wright, John Houser, Sherry Sheckels · First published 2009Open the Tome
Juventud 90 : realidad socio-religiosa de la juventud colombiana 10 y 11 de BachilleratoPedro P.M. Espina · First published 1991Open the Tome
