Khalifa, M. (1989). Fitting a theoretical modle to the waiting time to first conception with an application to Sudan. test, 23(2), 26-57. doi: 10.21608/mskas.1989.416762
Mona Khalifa. "Fitting a theoretical modle to the waiting time to first conception with an application to Sudan". test, 23, 2, 1989, 26-57. doi: 10.21608/mskas.1989.416762
Khalifa, M. (1989). 'Fitting a theoretical modle to the waiting time to first conception with an application to Sudan', test, 23(2), pp. 26-57. doi: 10.21608/mskas.1989.416762
Khalifa, M. Fitting a theoretical modle to the waiting time to first conception with an application to Sudan. test, 1989; 23(2): 26-57. doi: 10.21608/mskas.1989.416762