Ohmann, Lewis F. <br/><br/>
Estimating plant biomass for undergrowth species of northeastern Minnesota / 
Lewis F. Ohmann,  David F.Grigal and  Lynn L. Rogers 
 - Washington :  United States Government Printing Office,  1981 
 - 10 p. :  ill ;  26 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Biomass energy<br/>Gas producers
<br/><br/><label>Dewey Class. No.: </label>333.9539