1. Betz, W.H. and L.D., chemical engineers

Library: Central Library and Documents Center of Tehran University (Tehran)

Subject: Water- Purification,Water-- Analysis

Classification :
TD
430
.
B43

2. Tests and assessment /W. Bruce Walsh, Nancy E. Betz.

Library: Library of Institute of Psychology and Educational Sciences of Tehran University (Tehran)

Subject: Psychological tests.,Ability--Testing.,Psychometrics.