v.1- The earth and earth science (96p.); v.2- Physical sciences and technology (112p.); v.3- The arts (96p.); v.4- People in history (112p.); v.5- Folklore and religions (96p.); v.6-Europe (96p.); v.7- Asia, Australia, and New Zealand (104p.);

v.8-Africa (96p); v.9- The Americas (96p.); v.10- Plants (96p.) v.11- Birds, insects, reptiles, and aquatic life (96p.); v.12- Mammals (96p.); v.13-Reference guide and index (112p.)

112p., 96p., 112p., 96p., 96p., 104p., 96p., 96p., 96p., 96p., 96p., 112p.)

v.1- The earth and earth science; v.2- Physical sciences and technology; v.3- The arts; v.4- People in history; v.5- Folklore and religions(96p.,); v.6-Europe; v.7- Asia, Australia, and New Zealand; v.8- Africa; 112p., 96p., 112p., 96p., 96p., 104p., 96p., 96p., 96p., 96p., 96p., 112p.)

v.9- The Americas; v.10- Plants; v.11- Birds, ins