edited by Clarence L. Barnhart, Robert K. Barnhart ; prepared in cooperation with World Book, Inc

World Book c1992

v. 1 : A-K , v. 2 : L-Z

Available at 21 libraries

edited by Clarence L. Barnhart, Robert K. Barnhart ; prepared in cooperation with World Book, Inc

World Book c1991

v. 1, A-K , v. 2, L-Z

Available at 14 libraries

edited by Clarence L. Barnhart, Robert K. Barnhart ; prepared in cooperation with World Book, Inc

World Book c1990

v. 1, A-K , v. 2, L-Z

Available at 24 libraries

Field Enterprises c1950

v. 1 : A , v. 2 : B , v. 3 : C , v. 4 : D , v. 5 : E , v. 6 : F , v. 7 : G , v. 8 : H , v. 9 : I-J , v. 10 : K-L , v. 11 : M , v. 12 : N-O , v. 13 : P , v. 14 : Q-R , v. 15 : S , v. 16 : T , v. 17 : U-V , v. 18 : W・X・Y・Z , v. 19 : Reading and study guide

Available at 3 libraries

World Book 1989, c1986 1989 ed

World Book c1989

v. 1 : A , v. 2 : B , v. 3 : C-Ch , v. 4 : Ci-Cz , v. 5 : D , v. 6 : E , v. 7 : F , v. 8 : G , v. 9 : H , v. 10 : I , v. 11 : J・K , v. 12 : L , v. 13 : M , v. 14 : N・O , v. 15 : P , v. 16 : Q・R , v. 17 : S-Sh , v. 18 : So-Sz , v. 19 : T , v. 20 : U・V , v. 21 : W・X・Y・Z , v. 22 : Research guide・Index , set

Available at 11 libraries

World Book c1988

v. 1 : A , v. 2 : B , v. 3 : C-Ch , v. 4 : Ci-Cz , v. 5 : D , v. 6 : E , v. 7 : F , v. 8 : G , v. 9 : H , v. 10 : I , v. 11 : J・K , v. 12 : L , v. 13 : M , v. 14 : N・O , v. 15 : P , v. 16 : Q・R , v. 17 : S-Sn , v. 18 : So-Sz , v. 19 : T , v. 20 : U・V , v. 21 : W・X・Y・Z , v. 22 : Research guide・Index , set

Available at 1 libraries

World Book, Inc. 1987, c1986 1987 ed

: set , v. 1 , v. 2 , v. 3 , v. 4 , v. 5 , v. 6 , v. 7 , v. 8 , v. 9 , v. 10 , v. 11 , v. 12 , v. 13 , v. 14 , v. 15

Available at 2 libraries

World Book c1987 Childcraft : the how and why library 14

Available at 12 libraries

World Book c1987 Childcraft : the how and why library 12

Available at 12 libraries