G. Halliday

• Consolidated Index to Flora Europaea
• Consolidated index to Flora Europaea
• Flora of Cumbria Comprising the Vice-counties of Westmoreland with Barrow in Furness
• Flowering plants and ferns of Cumbria
• Studies in the Carex glareosa complex
• Studies on the flora of the north Blosseville Kyst and on the hot springs of Greenland