New encyclopedia britannica in 30 volumes:Propedia, Macropedia, Vol. 1 to 19,( knowledge in depth) and Micropedia, Vol. 1 to Vol. 10
- 15th ed.
- Encyclopedia Britannica, Inc. ; 1978.
0852293305
Encyclopedia britannica
Macropedia
Propedia,
Micropedia
030.1 E. B . I.
0852293305
Encyclopedia britannica
Macropedia
Propedia,
Micropedia
030.1 E. B . I.