An ecological survey in northern Michigan
Adams, Charles C. (Charles Christopher), 1873-1955; Ruthven, Alexander Grant, 1882-1971; McCreary, Otto; Morse, Albert P. (Albert Pitts), 1863-1936; Walker, Bryant, 1856-1936; Wood, Norman Asa, 1857-; Peet, Max Minor, 1885-; Michigan. Geological Survey; University of Michigan. University Museum