1 J.H. Eberly, J.W. Gallagher, and E.C. Beaty, Multiphoton Bibliography, 1977 (University of Colorado and University of Rochester, Boulder, 1979), p. 76.
1 J.H. Eberly, J.W. Gallagher, and E.C. Beaty, Multiphoton Bibliography, 1978 (University of Rochester, University of Colorado, National Bureau of Standards, 1979).