The world book encyclopedia set value
- 1980 world book encyclopedia set value
- 1960 world book encyclopedia set value
- 1970 world book encyclopedia set value
- 1972 world book encyclopedia set value
- 1988 world book encyclopedia set value
- 1964 world book encyclopedia set value
- 1990 world book encyclopedia set value
- 1973 world book encyclopedia set value
- 1969 world book encyclopedia set value
- 1963 world book encyclopedia set value
- 1965 world book encyclopedia set value
- 1968 world book encyclopedia set value
- 1977 world book encyclopedia set value
- 1962 world book encyclopedia set value
- 1978 world book encyclopedia set value