by (United States)Donald H.Menzel;by (United States)Jay M.Pasachoff;by (United States)Ruth Sidel; by (United States)Donald E.K.;by (United States)Jerry J.W.;by (United States)Barry S.; by (United States)Donald Hearn;by (United States)M.Pauline Baker;by (United States)Bohumil Jurek; by (United States)Donald J.Bonald;by (United States)M.Bixby Cooper;by (United States)James R.Kearl; by (United States)John H.Postlethwait;by (United States)Janet L.Hopson;by (United States)Ruth C.Vere by (United States)Don K.;by (United States)Jim B.;by (United States)Linda K.L.; by (United States)Donald C.J.;by (United States)Maitland A.E.;by (United States)Valentine D.; by (United States)Donald A.Ball;by (United States)Wendell H.McCulloch,Jr.;by (United States)Ricki Le by (United States)Kurt H.;by (United States)Jay P.;by (United States)Elwood N.C.; by (United States)S.Maclane;by (United States)C.Birkhoff;by (United States)G.Orzech;