Tuna casserole turns ... 50?

Well, not exactly, but the "Better Homes and Gardens Junior Cook Book for the Hostess & Host of Tomorrow'' (Meredith, $16.95) apparently does. Touted -- truly? -- as the baby boomers first cookbook, it's been reissued, the San Jose Mercury News reports today in a Cox News Service report, with such recipes as (yum) tuna casserole with potato chip topping.