1. Reran, D. W., C. G. Little, and B. C. Willmarth (1971a): Acoustic Doppler measurements of vertical velocities in the atmosphere. Nature, 230, 160–162.
2. Reran, D. W., and B. C. Willmarth (1971b): Doppler winds from a bistatic acoustic sounder. Proc. 7th Int. Symp. on Remote Sensing of Environment, May 17–21, Univ. of Michigan.
3. Chadwick, R. B., and E. E. Gossard (1983): Radar remote sensing of the clear atmosphere — review and application. Proc. IEEE, 71, (6).
4. Chadwick, R. B., K. P. Moran, R. G. Strauch, G. E. Morrison, and W. C. Campbell (1976): Microwave radar wind measurements in the clear-air. Radio Sci., 11, 795–802.
5. Derr, V. E. (1972): Remote sensing of the troposphere. Superintendent of Documents, U.S. Govt. Printing office, Washington, D.C. 20402.