Wrappers. Condition: Bueno. 15x22. 231pp. Plans, and diagrams. . Wrappers. Owner's signature on front cover, spine reinforced, otherwise vg. Soviet manual for hypdroelectric power plants. Part 2 only.
Wrappers. Condition: Bueno. 14.5x21.5. 79pp. Plans, and diagrams. . Wrappers. Paper sticker on front cover, stamp on title page, loss of paper on spine, otherwise vg+. Soviet manual for hydroelectric plants. .