Tag 'ref = 012'

• 18: ref
• 11: natural
• 11: source
• 10: species:de
• 10: genus:de
• 10: source:date
• 10: genus
• 10: species
• 10: circumference
• 10: start_date
• 9: height
• 8: operator
• 5: level
• 5: diameter_crown
• 5: indoor
• 3: leaf_type
• 2: check_date:ref
• 1: door
• 1: amenity
• 1: door:height
• 1: railway:turnout_side
• 1: railway