TY - BOOK AU - Jacobs, Dale W. (ed) TI - The World Book Encyclopedia, Vol 21: W - X - Y - Z SN - 0-7166-0095-1 U1 - 030/WOR/W PY - 1995/// CY - PB - Chicago: World Book, Inc. KW - Encyclopedias, Dictionaries N1 - 15686; Encyclopedias, Dictionaries ER -