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It may indicate the quantity and frequency of the accruals.
===$b Frequency of Use===
A measure of reference activity usually expressed as a ratio of a number of retrievals to time period, or by general terms such as active or inactive this subfiield indicates the measure of reference activity, usually expressed as a ratio of a number of retrievals to time period, or by general terms such as active or inactive.
===$5 Institution to which the Field Applies===
If the institution holds more than one copy the shelfmark of the item should be added after a colon.
===$8 Materials Specified===
Part of the described materials to which the field applies.
==Взаємопов’язані поля==