365 Days of DC House Ads, Day 27

House ad for World's Finest Comics #192 (March 1970) and Justice League of America v.1 #79 (March 1970) printed in Detective Comics #397 (March 1970)
Comic cover art: World's Finest #192: pencils by Curt Swan, inks by Murphy Anderson; JLA #79: pencils and inks by Neal Adams;
Ad designed and lettered by Gaspar Saladino