na INLIS000000000010509 Ind 0010-1118010509 On the theory of social change HAGEN, Everett E. Everett E Hagen. Bombay Vakils, Feffer and simon private 1962 158 p.; 23 cm. 158 p.; 23 cm. 301.15HAGo 301.15 SOCIAL CHANGE 189/76