University of Michigan Herbarium - Ann Arbor, Michigan <br/><br/>
Contribution from the University of Michigan Herbarium 

 - 1939-2007 
<br/><br/> -Existencias:  1939-1940 v.1-4 ;  1941-1942 v. 6-8; 1969-1972 v.9, no. 2-8; 1973 v. 10; 1973 v. 11, no. 1-5; 1974 v.12, no.3; 1978-2007 v. 13-25