Lettau, H. H. (1963). Studies of the effects of variations in boundary conditions on the atmospheric boundary layer. University of Wisconsin, Dept. of Meteorology.

Lettau, Heinz H. Studies of the Effects of Variations in Boundary Conditions on the Atmospheric Boundary Layer. Madison: University of Wisconsin, Dept. of Meteorology, 1963.

Lettau, Heinz H. Studies of the Effects of Variations in Boundary Conditions on the Atmospheric Boundary Layer. University of Wisconsin, Dept. of Meteorology, 1963.