76630. Hartley, M. E. and Penley, H. M.   The Lake Chatuge Sill Outlining the Brasstown Antiform.   Georgia Geological Survey, Atlanta, Georgia, 1974, GGS, Guidebook, Number 13 : 27 pages with illustrations.   Softbound, previous owners name, minor signs of use and age, text in very good condition.    $15.00

76629. Hatcher, R. D.   An Introduction to the Blue Ridge Tectonic History of Northeast Georgia.   Georgia Geological Survey, Atlanta, Georgia, 1974, GGS, Guidebook, Number 13-A : 60 pages with illustrations.   Softbound, crease down center, previous owners name, other minor signs of use and age, good condition.    $19.00