Index O (Index )
Official use only . . . 3.27-3.28
On-going bibliographies . . . 3.52-3.53
Open date . . . 2.13
Order of notes . . . 3.4-3.6
Order of subject headings . . . 4.1
Orientation . . . 3.23
Orientation compass . . . 3.23
Original version note . . . 8.1-8.7, E.6
Orthophotomaps . . . 1.9
Other physical details . . . 2.14
Outline and base maps . . . 1.9
Overseas acquisition number . . . 6.4, E.5
Overseas acquisitions card number . . . 6.4
Oversize . . . 1.22
Ozanne collection . . . 1.23
See also:
