Allen, Harry C. Molecular vib-rotors : the theory and interpretation of high res olution infra-red spectra / by Harry C. Allen, Jr and Paul C. Cross. - New York : Wiley , 1963. - 324 p. : ill. ; 27 cm. Subjects--Topical Terms: Molecular spectra.Spectrum, Infra-red. Dewey Class. No.: Q 535.842 ALL