You may also wish to search for items by Gupta, J. and Gupta.
Only one matching reference was found.
Singh, R.N.; Gupta, J.P.; Singh, N.; Singh, N.P.; Singh, O.P.; Singh, N.B.; Hopkins, R.H.; Mazelsky, R., Growth conditions of organic non-linear optical crystals, Thermochim. Acta, 1990, 165(2), 297-299. [all data]