Dhawan B D <br/><br/>
Economics of groundwater irrigation in hard rock regions. 

 -  1986 
<br/><br/><label>Standard No.: </label>79027 
<br/><br/><label>Source: </label> Annuals, Advances 
<br/><br/><label>Dewey Class. No.: </label>X9(D2).235'N7, M6