Four large halv leather-bindings with gilt lettered spines and red edges. Spines with old labels at heads and slightly rubbed.Corners mildly bumped. Else tight and wellkept bindings. Title-pages with former owner's red stamp in upper margins. Illustrated in black and white with numerous figures. Fine interior. XX, 674 p. , (II) + XVI, 869 p. , (III) + XX, 1023 p. , (III) + XX, 1061 p. , (V).