Reference : MM-1-21-477
Name of creator(s) : Michael Moerman
Scope and content : April 29, 1969. Prisons in Nan and Phrae would send the long-term prisoners to the prison in Phitsanulok. They were not sent to the prison in Chiang Mai because of the inconvenience of the required travel. There were also rumors about prison jailers at the prison in Chiang Mai and their extortion of the prisoners there.
Extent and medium : Punch card