Discovery series 1:50,000 : [Ireland] /
Ordnance Survey of Ireland.
Dublin : The Survey,
1993-
Relief shown by contours, layered tints, and spot heights.
In Irish, English, French, and German.
Includes notes, col. ill., index map, location map, and national grid diagram. Some maps include insets.
Sheet numbering system coordinated with set of topographic maps covering Northern Ireland.
An earlier ed. of no.78, (pub. 1991) is named "Rambler series". Earlier eds. of nos. 6, 71 & 79, (pub. 1992) are named as "1st series".
Sheet 56, pub. 1994 has 2nd. ed. on map & pub. 2001 has 3rd ed. on map.
Sheet 78, 3rd ed. is also pub. in a weatherproof  version.
Graphic index in central file.
Prel. ed./1st ed. Sheets 1-3, 6, 10-11, 16, 22-26, 27A. 28A-B, 30-53, 55-77, 80-89 (1993-2000) --
2nd ed. Sheets 1-3, 6, 10-11, 22-26, 28A-B, 30-34, 36-41, 43-45, 47, 49-51, 53, 55-78, 80-89 (1999-2005) --
3rd ed. Sheets 1-3, 6, 10-11, 16, 23, 25-26, 27A, 28A-B, 30-32, 34-35, 37-38, 43, 45, 50, 53-54, 59-61, 64, 66, 70, 77-78, 84-85, 88  (2004-12) --
4th ed. Sheets 3, 6, 11, 16, 24-25, 33, 36, 44-45, 52, 55, 57-58, 62-65, 67-69, 71-72, 74-75, 80, 89 (2012)