Spacing in X30 fields:

No spaces are used in initialisms.

Examples:

830 #0$aSpecial publication of the IEEE Power Engineering Society ;$vno. 19.

130 0#$aBible.$pN.T.$pMatthew.

One space is used between preceding and succeeding initials if an abbreviation consists of more than a single letter.

Example:

830 #0$aMineral resources series (Morgantown, W. Va.) ;$vMRS-7B.