00500nam a2200145 a 4500 20200116024711.0 090429s19uu xx 00 eng d Inventions that changed the world. Pleasantville, NY : Readers Digest, c1999. 160 p. : ill. (part col.) The eventful 20th century ; 4 Includes index. Inventions History OLOPSC 819.00Php 60820 60820 0 0 0 0 HSLRC HSLRC CIR 2020-01-16 819.00 0 T 15 I58 1999 HS5301 2025-05-23 00:00:00 2020-01-16 BK