Graduate programs in the physical sciences mathematics, agricultural sciences the environment et natural ressources 

. - Washington  : Person's, Thomson learning, 2001
. - 1045 p.  : ill. couv. ill. en coul.  ; 29 cm. 
<br/><br/><label>ISBN: </label>1093-8443  ; ISBN 07689-0374-2 
<br/><br/><label>Universal Decimal Class. No.: </label>500.058