1. Evaluation of routine scintiscanning of nontoxic thyroid nodules.I. The preoperative diagnosis of thyroid carcinoma
2. Seven New Typhlodromus from Mexico with Collection Notes on Three Other Species (Acarina: Phytoseiidae)
3. González, R., Padron, J., Ramírez, J., Sánchez, J., Vazquez, L. and Villareal, H. 1983.Guía para el cultivo de los cítricos en Nuevo León, 80–80. SARH.
4. Measurement of non-randomness in spatial distributions