Francis, A. J. <br/><br/>
Microbial activity in acid and acidified forest soils / 
A. J. Francis, D. Olson and R. Bernatsky 
 - Washington, D.C. :  United States Government Printing Office,  1981 
 - iii, 28 p. ;  28 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Plankton, Fossil--United States<br/>Paleontology--United States
<br/><br/><label>Dewey Class. No.: </label>560.1760973