"And if you can not edit the several fields, means a lock symbol appears into them. So, to enable editing, go to Administration -> Global System Preference and search for "BiblioAddsAuthorities" and Allow it and save. Now you can edit…"
"040 MARC field is for storing the Cataloguing Source information means from where we are going to take bibliographic information for cataloguing purpose. This MARC field usually contains the information of Organization(s) that actually created the…"