Permit-to-work
Subtitle: a learning aid for the installation and maintenance of effective permit-to-work systems.
Publisher: The Board
Published: 1977
Place of publication: Staines
Language: eng
Notes: "... material in this document has been taken from the booklet "Principles of safe maintenance" prepared by I.C.I. Limited... " - acknowledgement.

"Supplement 'D' to information paper no.16" - front cover.