TY - BOOK AU - Petroski, Henry. CN - T212 CN - T212 CY - New York : DA - 1992. ET - 1st ed. ID - 146063 KW - Inventions. KW - Patents. PB - Knopf, PP - New York : PY - 1992. SN - 0679412263 T1 - The evolution of useful things / TI - The evolution of useful things / ER -