1. Design, evaluation, and analysis of questionnaires for survey research / Willem E. Saris, Irmtraud N. Gallhofer.
Second Edition.
HN29 S29 2014
2. Scale in spatial information and analysis / Jingxiong Zhang, Peter M. Atkinson, and Michael F. Goodchild.
Boca Raton, FL : CRC Press, Taylor and Francis, 2014.
G70.212 Z52 2014