TY - JOUR ID - 129328215 TI - Trenton and Somme Gravel Specimens Compared with Ancient Quarry Refuse in America and Europe PY - 1893 PB - Chicago (Ill.) : University of Chicago press, DB - UniCat UR - https://www.unicat.be/uniCat?func=search&query=sysid:129328215 AB - ER -