TY - SER ED - National Academy of Sciences, India. TI - Proceedings of the National Academy of Sciences, India Section A: Physical Sciences SN - 0369-3236 U1 - 506.254 PY - 1942/// CY - Allahabad [India] PB - Council of the National Academy of Sciences, India KW - Science KW - Physical Science KW - Journals N1 - Print ER -