Pornchai Nalavachai. (1999) Factors affecting amphetamine disposal offence in Saraburi Provincial Police Region : study of opinion of the Police Narcotics Supperssion Units. Mahidol University,:ม.ป.ท.Pornchai Nalavachai. 1999. Factors affecting amphetamine disposal offence in Saraburi Provincial Police Region : study of opinion of the Police Narcotics Supperssion Units. ม.ป.ท.:Mahidol University,;Pornchai Nalavachai. Factors affecting amphetamine disposal offence in Saraburi Provincial Police Region : study of opinion of the Police Narcotics Supperssion Units. ม.ป.ท.:Mahidol University, 1999. Print.