Hudson Bay. Surface water supply of United States, 1930: pt. 5. Hudson Bay and upper Mississippi River basins; Carl G. Paulsen, acting chief hydraulic engineer. C. L. Batehelder, H. C. Beckman, F. C. Christopherson, H. E. Grosbach, R. G. Kasel, J. H. Morgan, S. B. Soulé, P. R. Speer, and A. H. Tuttle district engineers.