hi all I'm working a branch library of the university. We are cataloging our library records to the main library's database. But they are not let us to use the circulation systems. Because of this I want to use the koha to make my library's circulation. Our records are usmarc format and we use LC call numbers at 050 fields first and second indicators are 0. It will be welcome for us to resolve LC call number problem at Koha. By the way I'm using a little book called "Understanding MARC Bibliographic: Machine-Readable Catatoging" which can be downloadable from LC's web sites. http://www.loc.gov/marc/umb/ The book is explain most using marc tags with examples. You can download the chapters and print out them to use hard copy. Zeki Celikbas Librarian ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Istanbul Technical University e:mailto:celikbas@itu.edu.tr Faculty of Aero. & Astro. w:http://www2.itu.edu.tr/~celikbas 80626 Maslak Istanbul Turkey t:(212)2853108 f: (212)2853139 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~