TY - BOOK ID - 146105105 TI - The metals of the rare earths AU - Spencer, James Frederick AU - Findlay, Alexander PY - 1919 PB - London : Longmans, Green, DB - UniCat KW - RARE EARTHS UR - https://www.unicat.be/uniCat?func=search&query=sysid:146105105 AB - ER -