Willis Ray Gregg (January 4, 1880 – September 14, 1938) was an American meteorologist and chief of the U.S. Weather Bureau who made major contributions to aviation.
Willis Ray Gregg (January 4, 1880 – September 14, 1938) was an American meteorologist and chief of the U.S. Weather Bureau who made major contributions to aviation. (en)
Willis Ray Gregg (January 4, 1880 – September 14, 1938) was an American meteorologist and chief of the U.S. Weather Bureau who made major contributions to aviation. (en)