Lawal ,mb [mohammed a . a <br/><br/>
Environmental education workshop and seminar  proceeding ,m b 1990 . ,vol a .a 
Lawal , m. b and mohammed, a.a  
 - Lagos  Marian Ajibola ent  1994 
 - v.123p  pbk 
<br/><br/><label>ISBN: </label>9783269127 
<br/><br/><label>LC Class. No.: </label>e6 1994< 13 .