Columbia subject headings:
Cosmology.
General relativity (Physics)
Gravitation.
Raychaudhuri, A. K.
Vaidya, P. C. (Prahlad Chunilal), 1918-2010.
Harvard subject headings:
Cosmology.
General relativity (Physics)
Gravitation.
Raychaudhuri, A. K.
Vaidya, P. C. (Prahlad Chunilal), 1918-2010.
Princeton subject headings:
Cosmology.
General relativity (Physics)
Gravitation.
Raychaudhuri, A. K.
Vaidya, P. C. (Prahlad Chunilal), 1918-2010.