TY - BOOK AU - Thorpe,R.S. ED - Open University. TI - Origins of igneous rocks and metal ores ( motion picture) PY - 1972/// CY - Milton Keynes : PB - Open University, KW - Rocks, Igneous N1 - Dr. R. S. Thorpe explains that the aim of the first part of the programme is to approach the strontium isotope method for determining the origin of igneous rocks in a different way to thar adopted in the unit; Back up in U-matic; Bahan rosak (Lupus) ER -