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Roger T. Peterson
Edward Howe Forbush
E. & J. May Forbush
Forbush, Edward Howe & May, John Richard
Roger T. & E.L.Chalif Peterson
Forbush, Edward H; Revised May, John R.
Forbush, Ewd. H, &John May

See also:

Peterson, Roger Tory
Forbush, Edward Howe, Revised & Abridged With Addition Of More Than 100 Species By John Richard May
Peterson, Roger Tory and Virginia Marie Peterson