In 260 MARC field: Publication Distribution, Etc. symbols are \r\nmissing. There should be : (Colon) after Place of publication.... , \r\n(Coma) after Place of Publication and . (dot) after Date of Publication \r\nDistribution.
Dr. Anupam Chanda
DBCET, Guwahati, Assam
Koha-Library-Management-System Cataloging 08-09 min 50-60 sec
260 tag sub-field a b c are available you just need to enter the details, punctuation marks are not required. It will take automatically by MARC21 in OPAC view.