1992-1995 91, 127, 159 p., 9, 80 figures, 16, 32 coloured plates, 16, 16 distribution maps, paperbound (parts 1-2) & hardbound (dust jacket). In English. Library stamps and removed sticker mark on dust jacket, else good copy.
1992-1995 222 p., numerous coloured photographs, numerous maps, hardbound. With CD-Rom. In English and Bulgarian. Library stamps, else very good copy.
2007 222 p., num. col. photographs, num. maps, hardbound. With CD-Rom. In English and Bulgarian. New copy.