Source. 1937, 178:1. 1941, 103:35-43. RL 218:11. 1945, 138:21, 22. 1947, 59:23. 1949, 185:16, 17; 201:1. 1951, 140:9. 1953, 209:9-12. RSA 282:12(H). 1955, 141:17-19. 1957, 118:14. 1969, 460:21. 1973, 589:9, 10. 1975, 393:4. 1981, 408:3, eff. Oct. 1, 1981.