books.google.it - Rigorous examination of relationship between loss of energy, mass and radius of stars in a steady state. Unabridged, corrected republication of original (1939) edition. "The material is throughout presented with enviable crispness and clarity of expression. The work will undoubtedly become an indispensable...http://books.google.it/books/about/An_introduction_to_the_study_of_stellar.html?hl=it&id=joWn8s2BF04C&utm_source=gb-gplus-shareAn introduction to the study of stellar structure
