"Elementary Statistical Mechanics" by R. K. Gupta and O. P. S. Gahlaut (not Gupta and Kumar) is a popular textbook on statistical mechanics. Here's what I found:
Chapter 7: Statistical Theory of Simple Systems elementary statistical mechanics by gupta and kumar pdf
The book is structured to provide a comprehensive transition from classical to quantum frameworks: "Elementary Statistical Mechanics" by R
Distribution Laws: Detailed treatment of classical distribution laws and transport properties. elementary statistical mechanics by gupta and kumar pdf
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