Symbols for tourist guides, maps, and country side recreation /

Míreanna comhchosúla

• Symbol sourcebook : an authoritative guide to international graphic symbols /
  de réir: 283846 Dreyfuss, Henry
  Foilsithe / Cruthaithe: (1972)
• Symbol around us /
  de réir: 362057 Achen, Sven Tito
  Foilsithe / Cruthaithe: (1981)
• Public information symbols
  de réir: 8096 British Standards Institution
• Symbols used on geological maps/
  de réir: Bureau of Mineral Resources, Geology and Geophysics
  Foilsithe / Cruthaithe: (1989)
• Graphical symbols for cool preparation plant
  de réir: 8096 British Standards Institution