- 1Reference: PL/NIX/Introduction
Title: Introduction
Level of description: - 2Reference: PL/NIX1/18
Title: Correspondence file
Level of description: file
Date Free Text: Mar-Oct 1986
Production date: From: 1986 To: 1986 - 3Reference: PL/NIX1/19
Title: Correspondence file
Level of description: file
Date Free Text: Oct 1986 - Jan 1987
Production date: From: 1986 To: 1987 - 4Reference: PL/NIX1/20
Title: Correspondence file
Level of description: file
Date Free Text: Feb - Aug 1987
Production date: From: 1987 To: 1987