Harvey, Ernest B. <br/><br/>
The effect of stand factors on the productivity of wheeled skidders in eastern Maine / 
Ernest B. Harvey and Thomas J. Corcoran. 
 - Orono, Maine :  University of Maine,  1967. 
 - 35 p. :  ill. ;  23 cm. 
<br/><br/>Includes bibligraphical references 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Productions.