Chicago
Encyclopedia Britannica,Inc
1989
852295049
1987
852294662
Encycopedia Britannica,Inc
1988
852294867
1981
085229381x
1984
852294174
Field Entreprises Educational Corporation
1967
Field Entreprises Educational
1974
716604744
World Book,Inc
1983
716604833
1982
716604825
1985
071660485x
Field Enterprises Educational Corporation
1977
716604779
1978
716604787
1975
716604752
New York
716604841
1976
716604760
1970
1972
716604728
1971
071660471x
1973
716604736