WASET
    P. Thepnarintra and  S. Nikorn,  A Study on Fundamental Problems for Small and Medium Agricultural Machinery Industries in Central Region Area.   journal   = {International Journal of Economics and Management Engineering}, [online]. World Academy of Science, Engineering and Technology.
    November 2013, vol. 83(11). 2987 - 2991
    [viewed 28 March 2024]. Available from: https://publications.waset.org/pdf/10003097.