Gensch, Robert H. 
29. 1946, List of Birds Seen on Isle 
Royale National Park, Michigan 
from May 8, 1946, to June 4, 
1946. U. S. Fish and Wildlife 
Service. 8 p. 
Gilbert, Karl T. 
30. 1946. Isle Royale Bird List, 
National Park Service. 15 p. 
Krefting, Laurits W. 
31. 1946. Daily Notes on Trip to Isle 
Royale National Park, May 9-17, 
1946. U. S. Fish and Wildlife 
Service. 1 p. 
32. 1946. Daily Notes, Isle Royale 
National Park Wildlife Studies, 
September 7-26, 1946. U. S. 
Fish and Wildlife Service. 1 p. 
33. 1947. Field Notes on Isle Royale 
National Park, May 18-30, 1947. 
U. S. Fish and Wildlife Service. 
1 P. 
Krefting, Laurits W., and 
Forrest B. Lee 
34. 1963. Observations on the Birds 
of Isle Royale, August 5-9, 
1963. U. S. Fish and Wildlife 
Service. 1 p. 
Krefting, Laurits W., and T. S. 
Shields 
35. 1951. Observations on the Birds 
of Isle Royale National Park, 
May 16 - June 4, 1950. U.S. 
Fish and Wildlife Service. 
Lee, Forrest B., and L. W. 
Krefting 
36. 1948. Observations on the Bird 
Life of Isle Royale National 
Park, May 2-26, 1948. U. S. 
Fish and Wildlife Service, 
30 p. 
Linn, Robert M. 
37. 1957. The Spruce-Fir, Maple-Birch 
Transition in Isle Royale 
National Park, Lake Superior. 
Ph.D. Thesis, Duke University, 
101 p. 
Presnall, Clifford C. 
38. 1944. Field Notes on Isle Royale 
National Park, May 7-13, 1944. 
U. S. Fish and Wildlife Service, 
3 p. 
Shelton, Philip C. 
39. 1960-63. Field Notes on Isle 
Royale Birds. In Author*s 
Personal Files, Department of 
Forestry and Conservation, 
Purdue University, Lafayette, 
Indiana. 
Stearns, William and John H. 
Malone 
40. 1875-93. Journal of Lighthouse 
Station at Menagerie Island, 
Isle Royale, Michigan. Isl*e 
Royale National Park, Houghton, 
Michigan. (Contains references 
to the birds, June 12, 1884, 
to September 24, 1893.) 
55 
