Ch ief ▁▁ ▁Frederick ▁Con verse ▁Beach , ▁ 1 9 0 2 – 1 9 1 7 . ▁Engine er ▁and ▁editor ▁of ▁Scient ific ▁American ▁magazine . ▁ ▁George ▁Ed win ▁R ines , ▁ 1 9 1 7 – 1 9 2 0 . ▁Author ▁and ▁editor . ▁ ▁A . ▁H . ▁Mc D ann ald , ▁ 1 9 2 0 – 1 9 4 8 . ▁Re porter ▁( B alt imore ▁News ▁and ▁Baltimore ▁Even ing ▁Sun ), ▁editor , ▁and ▁author . ▁ ▁Lav in ia ▁P . ▁D ud ley , ▁ 1 9 4 8 – 1 9 6 4 . ▁Editor ▁( En cyc lop ædia ▁Britannica ▁and ▁Encyclopedia ▁Amer icana ) ▁and ▁manager ; ▁first ▁woman ▁to ▁head ▁a ▁major ▁American ▁reference ▁publication . ▁ ▁George ▁A . ▁Corn ish , ▁ 1 9 6 5 – 1 9 7 0 . ▁Re porter ▁( New ▁York ▁Her ald ▁Trib une ) ▁and ▁editor . ▁ ▁Bernard ▁S . ▁C ay ne , ▁ 1 9 7 0 – 1 9 8 0 . ▁Edu c ational ▁research er ▁( E du c ational ▁Test ing ▁Service , ▁Harvard ▁Edu c ational ▁Review ), ▁editor ▁( G inn ▁& ▁Co ., ▁Col lier ' s ▁Encyclopedia , ▁Mac mill an ) ▁and ▁business ▁executive ▁( G ro lier ▁Inc .). ▁ ▁Alan ▁H . ▁Smith , ▁ 1 9 8 0 – 1 9 8 5 . ▁Editor ▁( G ro