Circle : English for adult learners : in 2 parts / [Natela Dogonadze ; ill. Maria Matsagishvili]. - 3rd ed.. - Tbilisi : [GTU], 2003. - 434 p. : ill. ; 20 cm.см.. - ფასი სახელშეკრულებო, 500 cop.[MFN: 175281]
English for business purposes : Compatible with "Circles. Engl. for adult learners" / N. Doghonadze ; [Ed. Judith Mader]. - Tbilisi, 2005. - 102 p. ; 29 cm.см.. - ISBN 99940-0-952-4[MFN: 193650]