a Yadav, P.R. <br/><br/>
\a Environmental Biology  \h [Text] 
\c by P.R. Yadav and Shubhrata R. Mishra 
 - \a New Delhi:  \b Discovery Publishing House,  \c 2004 
 - \a 302p.:  \b ill. 
<br/><br/><label>ISBN: </label>\a 9788171417568 
<br/><br/><label>LC Class. No.: </label>\a QH 545.A1 Yad  / \b 513027