https://catalogue-scientifique.canada.ca/record=1031767~S6*frc
Rechercher Jam`īyah al-Zhiyūlūzhīyah al-Miṣrīyah; Rechercher Markaz al-Qawmī lil-Buḥūth (Egypt); Rechercher Markaz al-Qawmī lil-I`lām wa-al-Tawthīq
Published by the Geological Society of Egypt in collaboration with the National Research Centre, 1960
Publication gouvernementale