Bibliography

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Author Title [ Type(Desc)] Year
Filters: First Letter Of Title is S and Author is Pettingill Jr., Olin Sewall  [Clear All Filters]
Journal Article
Jr. OSewall Pet, Graber RR, Graber JW.  1957.  The summer birds of Wilderness State Park, Michigan. Jack Pine Warbler. 35:43-63.
Jr. OSewall Pet.  1944.  A summer program for bird study. The American Biological Teacher. 6:86-89.