Spacing:

No spaces are used in initialisms or personal name initials/letters that appear as part of the series title.

Examples:

490 0#$aEducation U.S.A. special report

490 1#$aMémoire du BRGM,$x0071-8246 ;$vno 123

When an item has been issued within a series during part of its lifetime or has been issued in different series during different periods or in a series whose title has changed, three spaces are customarily input in subfield $a when only a beginning date or volume is present.

Example:

490 1#$a1981-82- : NEA research memo