TY - BOOK ID - 126571371 TI - Principia mathematica AU - Whitehead, Alfred North AU - Russell, Bertrand PY - 1912 PB - London: Cambridge university press, DB - UniCat KW - Mathematics KW - Logic, symbolic and mathematical UR - https://www.unicat.be/uniCat?func=search&query=sysid:126571371 AB - ER -