This 1968 booklet was in my parents' possession.
"If you should hear the Attack Warning Signal -- unless your local government has instructed you otherwise -- go immediately to a public fallout shelter ... or to your home fallout shelter. Turn on a radio ... and listen."
"To avoid injuring your eyes, never look at the flash of an explosion or the nuclear fireball."
"This chapter tells you what supplies and equipment to take with you if you go to a public fallout shelter, and what items you should keep on hand if you plan to use a family fallout shelter at home."