HEFNAWI, .., Hassanein, .., Younis, .. (1972). Pill – a – month as an Oral Contraceptive. test, 5(1), 1-17. doi: 10.21608/mskas.1972.417099
.F HEFNAWI; .M Hassanein; .N Younis. "Pill – a – month as an Oral Contraceptive". test, 5, 1, 1972, 1-17. doi: 10.21608/mskas.1972.417099
HEFNAWI, .., Hassanein, .., Younis, .. (1972). 'Pill – a – month as an Oral Contraceptive', test, 5(1), pp. 1-17. doi: 10.21608/mskas.1972.417099
HEFNAWI, .., Hassanein, .., Younis, .. Pill – a – month as an Oral Contraceptive. test, 1972; 5(1): 1-17. doi: 10.21608/mskas.1972.417099