1. Infrared Heterodyne Spectroscopy of Carbon Dioxide in Planetary Atmosphere;Betz,1977
2. Spectroscopic measurements of Mars and Venus with heterodyne techniques;Betz,1982
3. Heterodyne detection of CO2 emission lines and wind velocities in the atmosphere of Venus;Betz;Ap. J.,1976
4. Laser heterodyne spectroscopy;Betz,1977
5. Data Reduction and Error Analysis for the Physical Sciences;Bevington,1969