Butterflies in colour /
Lyneborg, Leif.
Hancke, Verner.
Campbell-Ferguson, Kirsten.
Midwinter, Henry John.
Jonsson, Niels.
London Blandford Press
1974
Originally published: in Danish. Kobenhavn [Copenhagen] : Politikens, 1974
Bibliography: p.154. - Includes index
Butterflies