1. Spectrophotometric determination of rare earth metals with 4-(2-pyridylazo)-resorcinol;Munshi;Anal. Chem,1964
2. 2-(p-sulfophenylazo)-1,8-dihydroxy naphthalene-3,6-disulfonic acid as a sensitive reagent for rare earth metals;Munshi;Microchem. J,1964
3. Photometric determination of the rare earths with Xylenol Orange;Munshi;Chemist-Analyst,1964
4. Sangal, S. P., Sinha, S. N., and Dey, A. K., D.Sc. Thesis S. N. Sinha (1964) and S. P. Sangal (1965), Allahabad (Unpublished work).
5. Sangal, S. P., Sinha, S. N., and Dey, A. K., Spectrophotometric determination of the lanthanoids with aluminon as a chromogenic reagent. Chemist-Analyst (In press).