TY - BOOK ID - 134051075 TI - Subsurface geologic methods : a symposium AU - Le Roy, Leslie Walter AU - Crain, Harry M. PY - 1949 PB - Golden : Colorado School of Mines, DB - UniCat KW - Geology KW - Research. UR - https://www.unicat.be/uniCat?func=search&query=sysid:134051075 AB - ER -