Sirisak Chertkiattipol และ Tanya Niyamapa; Vilas Salokhe. (2009) Study on the Specic Tilling Energy of Three Types of the Rotary Blades. <i>Thai Agricultural Research Journal</i>, <i>27</i>(3), 316-331.Sirisak Chertkiattipol และ Tanya Niyamapa; Vilas Salokhe. "Study on the Specic Tilling Energy of Three Types of the Rotary Blades". Thai Agricultural Research Journal 27 (2009):316-331.Sirisak Chertkiattipol และ Tanya Niyamapa; Vilas Salokhe. Study on the Specic Tilling Energy of Three Types of the Rotary Blades. Department of Agriculture:ม.ป.ท. 2009.