For example, if a month breaks down a volume number (i.e a volume is made up of a series of months), it should follow the volume number in the enumeration field.
(a month; breaks down; a volume number (i.e a volume is made up of a series of months) (it; should follow; the volume number in the enumeration field)
a month it
breaks down should follow
a volume number (i.e a volume is made up of a series of months
the volume number in the enumeration field