METAMORPHIC ROCKS
Sawyer Ava
DK Eyewitness Books: Rocks & Minerals, Paperback
R. F. Symes
A Practical Guide to Rock Microstructure
Introduction to the Rock-Forming Minerals, Paperback
W. A. Deer
Rocks: Hard, Soft, Smooth, and Rough, Paperback
Natalie M. Rosinsky
Rocks: Hard, Soft, Smooth, and Rough
Sedimentary Rocks
Jenny Fretland Vanvoorst
Igneous Rocks