10887. Editor.   Fifth Annual Field Conference.   The Kansas Geological Society, 1931, Guide Book, 5 : 1-98, 27 illustrations including six pocket maps and separates.   Original Field Book Binding, minor signs of use and age, very good condition.   Covers Oklahoma and Arkansas.   $125.00

10888. Editor.   Seventh Annual Field Conference.   The Kansas Geological Society, 1933, Guide Book, 7 : 1-54, with many maps and sections.   Original Field Book Binding, minor signs of use and age discoloration, very good condition.   Covers Oklahoma and Arkansas.   $40.00

10889. Editor.   Eleventh Annual Field Conference.   The Kansas Geological Society, 1937, Guide Book, 11 : 1-108, 33 figures and 2 fold out maps with cross section.   Comb binding coming apart, usual signs of use and age discoloration, text in very good condition.   Southeastern Kansas and Northeastern Oklahoma focusing on Carboniferous, Permian, and Pennsylvanian Rocks.   $42.00

74940. Koenig, J. W.   Guidebook Twenty-Sixth Regional Field Conference, Northeastern Missouri and West-central Illinois.   The Kansas Geological Society, 1961, KGS, Report of Investigations, Number 27 : 168 pages with illustrations.   Comb bound, previous owners name, minor signs of use and age, text in very good condition.    $31.00

74935. Kansas Geological Survey.   Guidebook Twenty-Eight Regional Field Conference, North-Eastern Oklahoma.   The Kansas Geological Society, 1964, KGS, Guidebook, 77 pages with illustrations.   Comb bound, previous owners name, minor signs of use and age, text in very good condition.    $31.00