TY - BOOK ID - 127895634 TI - Paul Ehrenfest : making of a theoretical physicist PY - 1970 SN - 0720401631 PB - Amsterdam : North-Holland, DB - UniCat KW - Ehrenfest, Paul, UR - https://www.unicat.be/uniCat?func=search&query=sysid:127895634 AB - ER -