1962 With G. Pizzella and D. Venkatesan. The morphology and temporal variations of the Van Allen radiation belt, October 1959 to December 1960. J. Geophys. Res. 67:3651-68.

1966 Time-variations of cosmic rays. In Handbuch der Physik, vol. XLIX/1, ed. S. Flügge, pp. 159-247. Berlin: Springer-Verlag.

1967 A variation, with a period of two solar cycles, in the cosmic-ray diurnal anisotropy. J. Geophys. Res. 72:4937-39.

1970 With S. P. Duggal and M. A. Pomerantz. The variation with a period of two solar cycles in the cosmic ray diurnal anisotropy for the nucleonic component. J. Geophys. Res. 75:1150-56.

1973 Cosmic ray diurnal anisotropy 1937-1972. J. Geophys. Res. 78:7933-41.

1982 With S. P. Duggal, M. A. Pomerantz, and C. H. Tsao. Random fluctuations, persistence, and quasi-persistence in geophysical and cosmical periodicities: A sequel. Rev. Geophys. Space Phys. 20:971-76.

1983 With M. A. Pomerantz, S. P. Duggal, and C. H. Tsao. Statistical considerations in the analysis of solar oscillation data by the superposed epoch method. Sol. Phys. 82:113-22.

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