SPRENT, Janet I. <br/><br/>
The ecology of the nitrogen cycle 
/[by] Janet I.Sprent 
 - Cambridge  Cambridge University press  1987 
 - viii, 151 p.- 
 - Cambridge studies in ecology .
<br/><br/> Includes reference & index. 
<br/><br/><label>ISBN: </label>521310520 
<br/><br/><label>Dewey Class. No.: </label>574.52  / SPR