Edit. Salamander Books Ltd.,1985 England. 4ºM (31×22,5cm). 274 págs. Cartoné con sobrecubierta ilustrada en buen estado. Sobrecubierta deslucida. «This unique and wonderful contribution to zoological literature can justly be described as one of the finest books on butterflies produced the twenty century. It is a work of the highest scientific order, written and compiled by a leading authority and Fellow of the Royal Entomological Society of London.»