prepared from surveys by the Wisconsin Geological and Natural History Survey, E.A. Birge, PH. D., Director ; hydrography in charge of L.S. Smith, C.E. ; field work by L.S. Smith & H.M. Trippe
prepared from surveys by the Wisconsin Geological and Natural History Survey ; hydrography in charge of L.S. Smith ; field work by L.S. Smith and H.M. Trippe
prepared from surveys by the Wisconsin Geological and Natural History Survey, E.A. Birge, PH. D., Director. Hydrography in charge of L.S. Smith, C.E. Field work by L.S. Smith & H.M. Trippe
prepared from surveys by the Wisconsin Geological and Natural History Survey. E.A. Birge, PH. D., Director. Hydrography in charge of L.S. Smith, C.E. Field work by L.S. Smith & H.M. Trippe ..
prepared from surveys by the Wisconsin Geological and Natural History Survey ; E.A. Birge, PH.D., director ; hydrography in charge of L.S. Smith ; field work by L.S. Smith and H.M. Trippe