The author wishes to thank Associate Professor Dr.Jumpen Ontong from Natural Resourses Faculty, Prince of Songkla University and Professor Dr.Waykin Nopanitaya for helpful advice and editing
The author wishes to thank AssociateProfessor Dr.Jumpen Ontong from NaturalResourses Faculty, Prince of SongklaUniversity and Professor Dr.WaykinNopanitaya for helpful advice and editing