LEVRET, ANDRÉ. Observations sur les Causes et les Accidens de Plusieurs Accouchemens Laborieux . . . Seconde Édition. Folding engraved plate. xvi, 170, [6] pages, including half-title and final blank. bound with his: Suite des Observations sur les Causes et les Accidens de Plusieurs Accouchemens Laborieux. 2 folding engraved plates. xxxvi, 427, [5] pages, including final blank. Together, 2 volumes in one. 8vo, 195x123 mm, contemporary mottled calf gilt, spine ends chipped, front joint cracked, cords intact, bottom edge of front cover and opening leaves gnawed; contents generally clean, small tape repair on verso of plate in first work. Paris: Delaguette, 1750; 1751