Hāshim, Ismāʻīl Muḥammad. Mushkilat al-sukkān [taʼlīf] Ismāʻīl Muḥammad Hāshim. - al-Ṭabʻah al-ʼūlá muʻaddalah, ṭabʻah muzayyadah munaqqaḥah. - Miṣr, Dār al-Maʻārif, [1963] - 302 p. : diagrs. ; 24 cm. LCCN: ne 64001571 Subjects--Topical Terms: Population. LC Class. No.: HB851 / .H3