Bodegom, Eric. <br/><br/>
Observation, research, and skychart iii projects / 
Eric Bodegom. 
 - 4th ed. 
 - [S.l.] :  Prentice-Hall,  2003. 
 - 48 p. ;  28 cm. 
<br/><br/><label>ISBN: </label>0131417428 9780131417427