Title: Rāingān kānwičhai rư̄ang kānsưksā kānkračhāi khō̜ng kham sap nai Čhangwat Phitsanulōk
First published: 1981
Description: Presentation of author's thesis that Phitsanulok Province be considered a part of central region based on predominant use of Bangkok Thai vocabulary as against north or northeastern.
LC classification: MLCME 93/01165 (G)