Gofynion technegol ar gyfer ffyrdd stad yng Ngwynedd =
Subtitle: Technicalrequirements for estate roads in Gwynedd.
Publisher: Yr Adran = The Department
Published: 1984
Place of publication: Caernarfon
Language: eng
Number of pages: 50
Other titles: Technical requirements for estate roads in Gwynedd.
Notes: Welsh and English text.