TY - BOOK TI - Leeches to lasers: A timeline of medicines T2 - (A timeline of...) SN - 978-0-7166-3542-0 U1 - Ref 610.9 L483 2016 PY - 2016/// CY - Chicago PB - World Book Inc. KW - Medicine KW - History KW - Juvenile literature KW - Medical innovations N1 - Includes index ER -