==2-- Блок місцезнаходження та доступу== ==Definition and Scope of Fields== This block contains the information needed to identify the institution, physical site or collection atwhich a bibliographic unit is located or from which it may be available.The following fields are defined: *[[hold/252|252 Location and Call Number]]*[[hold/255|255 Past Location and Call Number]]*[[hold/256|256 Electronic Location and Access]] ==Occurrence==A holdings record must contain a [[hold/252|field 252]] or a [[hold/256|field 256]] to identify the physical site location thatconsists of a combination of an institution identifier and identifiers of one or many of its sublocations. Others fields of [[hold/2XX|2-- block]] may be used if necessary.