Peter HADEKEL et Ann GIBBON, Steinberg : le démantèlement d'un empire familialBélanger · Consortium Erudit1992PDF252 KB
Hydraulic Systems and Equipment. R. Hadekel. Cambridge University Press. 1954. 224 pp. Illustrated. 18s.Hancock · Journal of the Royal Aeronautical Society1954PDF133 KB
Displacement Pumps and Motors. R. Hadekel. Pitman. London. 1951. 170 pp. 177 diagrams. Index. 25s. net.Journal of the Royal Aeronautical Society1951PDF82 KB
Hydraulic systems and equipment: by R. Hadekel. 221 pages, diagrams, 14 × 22 cm. New York, Cambridge University Press, 1954. Price, $0.00Marvin · Journal of the Franklin Institute1954PDF157 KB