Sharma, R.K, H.O. Gupta, and L. Rajeswari. "Metasomatic Action of Ammonium Oxalate." Conservation of Cultural Property in India 29 (1996): 39-43.

Sharma, R.K, H.O. Gupta, and L. Rajeswari. "Metasomatic Action of Ammonium Oxalate." Conservation of Cultural Property in India 29 (1996): 39-43.