Soil - The yearbook of Agriculture  No.30 
= Đất đai - Niêm giám thống kê về nông nghiệp 


 - The United States  Government Printing Office  1957 
 - 784p.  ill.  23cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Soil--The yearbook
<br/><br/><label>Subjects--Index Terms: </label>Soil Agriculture 
<br/><br/><label>Dewey Class. No.: </label>631.4  / S