48 MISCELLANEOUS PUBLICATION NO. 725, U.S. DEPARTMENT OF AGRICULTURE 
Hahn, Glenn Gardner. 75 
1949. Further evidence that immune ribes do not indicate 
physiologic races of Cronartium ribicola in North 
America. U. S. Bur. Plant Indus., Soils, and 
Agr. Engin. , Plant) Dis: Rptr. (332929122922 
[ Processed. 
Hahn, Glenn Gardner. 716 
1949. Junipers previously reported blight resistant now 
proved susceptible to Phomopsis juniperovora. 
U. S. Bur. Plant Indus., Soils, and Agr. Engin., 
Plant Dis:‘Rptri335," 328-330. [Processed] 
Hahn, Glenn Gardner. a1? 
1952. European larch canker. In Important Tree Pests of 
the Northeast, edited by Committee on Tree Pest 
Leaflets, New England Section, Society of Ameri- 
can Foresters. Ed. 2, ppt lis- Tis: alias: 
Hahn, Glenn Gardner, and Ayers, Theodore T. 718 
1934. Dasyscyphae on conifers in North America. I. The 
large-spored white-excipled species. Mycologia 
Z6:°'73=101 ;-illus. 
Hahn, Glenn Gardner, and Ayers, Theodore T. 719 
1934. Dasyscyphae on conifers in North America. II. D. 
ellisiana. Mycologia 26: 167-180. 
Hahn, Glenn Gardner, and Ayers, Theodore T. 720 
1934. The Dasyscphae on conifers in North America. III. 
Dasyscypha pini. Mycologia 26: 479-501. 
Hahn, Glenn Gardner, and Ayers, Theodore T. hey 
1936. The European larch canker and its relation to certain 
other cankers of conifers in the United States. 
Jour. Forestry 34: 898-908, illus. 
Hahn, Glenn Gardner, and Ayers, Theodore T. 722 
1938. Failure of Dasyscypha willkommii and related 
large-spore species to parasitize Douglas fir. 
Phytopathology 28: 50-57, illus. 
Hahn, Glenn Gardner, and Ayers, Theodore T. 123 
1943. Role of Dasyscypha willkommii and related fungi in 
the production of canker and die-back of larches. 
Jour. Forestry 4l: 483-495, illus. 
Hahn, Glenn Gardner, Hartley, Carl, and Pierce, Roy G. 724 
1917. A nursery blight of cedars. Jour. Agr. Res. 10: 
533-540, illus. 
Hahn, Glenn Gardner, Hartley, Carl, and Rhoads, A. S. 125 
1920. Hypertrophied lenticels on the roots of conifers and 
their relation to moisture and aeration. Jour. 
Agr. Res. 20: 253-266, illus. 
Hahn, Glenn Gardner, and Miller, Alton. 726 
1949. Rust immunity of Canadian black currants under 
field conditions in Connecticut. U. S. Bur. Plant 
Indus., Soils, and Agr. Engin., Plant Dis. Rptr. 
33: 275-276. [Processed.|] 
Hansbrough, J. R. 2% 
1934. Occurrence and parasitism of Aleurodiscus 
amorphus in North America. Jour. Forestry 32: 
452-458. 
