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Ludvigsen, Rolf
4
Royal Ontario Museum
4
Merriam, C. Hart (Clinton Hart), 1855-1942
3
Preble, Edward Alexander, 1871-1957
3
Russell, Frank, 1868-1903
3
United States. Bureau of Biological Survey
3
University of Iowa
3
Landing, Ed
2
Seton, Ernest Thompson, 1860-1946
2
Von Bitter, Peter H.
2
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