Bibliographies

283 163 Helminger, Paul, Frank C. De Lucia and Walter Gordy (1970). "Extension of Microwave Absorption Spectroscopy to 0.37-mm Wavelength." Phys. Rev. Lett. 25: 1397-1399.

368 234 Helminger, Paul, James K. Messer and Frank C. De Lucia (1983). "Continuously Tunable Coherent Spectroscopy for the 0.1- to 1.0-THz Region." Appl. Phys. Lett. 42: 309-310.