Ronnakorn Thepwong. 2013. Design improvements of a thai sail windmill for water pumping. , Rajamangala University of Technology Rattanakosin;
Ronnakorn Thepwong. (2013) Design improvements of a thai sail windmill for water pumping . Rajamangala University of Technology Rattanakosin/Bangkok.
Ronnakorn Thepwong. Design improvements of a thai sail windmill for water pumping. . Bangkok:Rajamangala University of Technology Rattanakosin, 2013.
Ronnakorn Thepwong. (2013) Design improvements of a thai sail windmill for water pumping . Rajamangala University of Technology Rattanakosin/Bangkok.