Published for the conversion of letter-coded BSP numbers to 9-digit numeric numbers in the 1960s.

For example: to convert C43.101, use the C-Series bookmark for 000-020-003.

Includes:
000-020-002 i1 Sep60 - B to Plant
000-020-003 i2 Feb64 - C to Plant
000-020-006 i2 Mar67 - E to Plant
000-020-007 i1 Dec66 - F to Plant
000-020-008 i1 Jul61 - G, J to Plant
000-020-011 i1 Dec66 - M to Plant

Note: all digits of letter series BSPs are not shown, so care is needed when searching by BSP number. Volunteers are considering developing a more complete document or spreadsheet.

Contributed and scanned by Steve Cichorsky. OCR and processing by Paul Fassbender.