TY  - BOOK
AU  - Gass,I.G.
AU  - Jackson,D.E.
AU  - Wilson,R.C.I.
ED  - Open University
TI  - Naming rocks: textures and mineral composition as criteria for rock identification 
PY  - 1973///
CY  - Milton Keynes
PB  - Open University
KW  - Palaeontology
ER  -