Dwivedi, J.N. <br/><br/>
Essentials of plant techniques 
J.N. Dwivedi, R.B. Singh. 
 - 15th ed.. 
 - Jodhpur  Scientific Publishers  1990 
 - 239p., ill.; 22cm. 
<br/><br/><label>Dewey Class. No.: </label>581.028  / D97E