TY - BOOK ED - World Book, Inc. TI - The World Book encyclopedia, W-X-Y-Z volume 21 SN - 0716600862 (set) U1 - 031 19 PY - 1986/// CY - Chicago PB - World Book KW - Encyclopedias and dictionaries N2 - An encyclopedia designed especially to meet the needs of elementary, junior high, and high school students ER -