1. The male factor in fertility and infertility. II. Spermatozoon counts in 1000 men of known fertility and in 1000 cases of infertile marriage;MacLeod;J Urol,1951
2. The male factor in fertility and infertility. III. An analysis of motile activity in the spermatozoa of 1000 fertile men and 1000 men in infertile marriage;MacLeod;Fertil Steril,1951
3. WHO laboratory manual for the examination of human semen and sperm-cervical mucus interaction;World Health Organisation,1980
4. WHO laboratory manual for the examination of human semen and sperm-cervical mucus interaction;World Health Organisation,1987
5. WHO laboratory manual for the examination of human semen and sperm-cervical mucus interaction;World Health Organisation,1992