How to conduct research.This research as a wotphak compound cross section Store information in November and December, the population is 2556 – 2556 rice mill workers in the sector. North East Thailand is qualified by nationality, aged 18 years and above. Work in Rice Mills, medium or large size not less than 3 months and are willing to, and cooperate in research. Distribution of samples according to the method of Cohen (Cohen, 1988). amounting to 146 samples samples selected using random group (Cluster random sampling) step is to areas Nazi lash. All Coop, 2 divided into East-North upper and lower the sampling area up 1. Northeastern lower randomly selected three provinces include province-1.69, 2.49 provinces man the man and the province has 28 classification by Rice Mills list of mills in three provinces that are registered with the Department of internal trade, Ministry of Commerce of each province is divided into two categories, namely, Rice Mills, medium (there are 18-30 colors. Wagon per day) is a large mill, high civil servants (there are more than 30 wagon per day).
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