Collins, Holden & Setchell, Phycoth. Bor.-Amer.
Collins, F.S.; Holden, I.; Setchell, W.A. [1-2300]

Brown University - Algae
Catalog #: ABRU00004158
G. V. N. Dearborn s.n. 02 May 1907
Microthamnion strictissimum Rabenhorst
United States, Massachusetts, Physiological Laboratory of Tufts College Medical and Dental School, Boston, MA

Yale University Herbarium
Catalog #: YU.094465
G. V. N. Dearborn s.n. 02 May 1907
Microthamnion strictissimum Rabenhorst
United States, Massachusetts, Physiological Laboratory of Tufts College Medical and Dental School, Boston, MA

University of Michigan
Catalog #: 730152
G. V. N. Dearborn #s.n. 02 May 1907
Microthamnion kuetzingianum Nägeli ex Kützing
United States, Massachusetts, Suffolk, Physiological Laboratory of Tufts College Medical and Dental School, Boston, MA

University of Michigan
Catalog #: 730153
G. V. N. Dearborn #s.n. 02 May 1907
Microthamnion kuetzingianum Nägeli ex Kützing
United States, Massachusetts, Suffolk, Physiological Laboratory of Tufts College Medical and Dental School, Boston, MA

Michigan State University Algae
Catalog #: MSC0183530
G.V.N. Dearborn #s.n. 02 May 1907
Microthamnion strictissimum Rabenhorst
United States, Massachusetts, Suffolk, Physiological Laboratory of Tufts College Medical and Dental School, Boston

Miami University - Algae
Catalog #: 000188495
G.V.N. Dearborn #s.n. 02 May 1907
Microthamnion strictissimum Rabenhorst
United States, Massachusetts, Suffolk, Physiological Laboratory of Tufts College Medical and Dental School, Boston