TY - BOOK ID - 126542547 TI - The sources of invention AU - Jewkes, John AU - Stillerman, Richard AU - Sawers, David PY - 1958 PB - London: MacMillan, DB - UniCat KW - History of inventions KW - Invention in industry KW - Invention history KW - History of science in 19 century KW - History of science in 20 century UR - https://www.unicat.be/uniCat?func=search&query=sysid:126542547 AB - ER -