Efecto del CIDR (Controlled Internal Drug Release) aplicado después de la inseminación artificial sobre la tasa de preñez en vacas de carne.

Tesis (Maestro en Ciencias Veterinarias) UANL, 2009.

The Columbian Orator : containing a variety of original and selected pieces ; together with rules ; calculated to improve youth and othersin the ornamental and useful art of eloquence

UANL

English grammar, adapted to the different classes of learners with an appendix, containing rules and observations, for assisting the more advanced students to write perspicuity and accuracy

UANL