Delens, Paul Sur quelques nouvelles acquisitions de la géométrie du tetraedre. (French) Zbl 0023.15606 J. Math. Pures Appl., IX. Sér. 18, 303-321 (1939). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Keywords:Elementary geometry, descriptive geometry × Cite Format Result Cite Review PDF