Pritchard,M.D.W. <br/><br/>
Environmental science 4 checkbook/ 
by M.D.W. Pritchard 
 - London :  Butterworth Scientific,  1982 
 - 189 pages :   illustrations ;   19cm. 
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>0408006633 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Human ecology