1. Observed triplication of PKP;Adams;Nature,1963
2. The fine structure of the Earth's core;Adams;Bull. Seismol. Soc.Am.,1964
3. Travel Times for the Indian Region;Agrawal,1975
4. Travel times of P for the Indian region;Agrawal,1978
5. Travel times of PKP up to 145°;Bolt;Geophys. J.,1969