omar, a. (1970). on the maintance of a system of machines by one repairman. the institute of national planning.
Lua i Stíl Chicago (17ú heag.)omar, ahmed. On the Maintance of a System of Machines by One Repairman. cairo: the institute of national planning, 1970.
Lua MLA (9ú heag.)omar, ahmed. On the Maintance of a System of Machines by One Repairman. the institute of national planning, 1970.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.