The world book encyclopedia. (London: World Book Inc, 1992)
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
Keywords: Encyclopedias and dictionaries