1. Effect of intra-uterine devices on corpus luteum function;Hawk;J. Anim. Sci.,1968
2. Interference with ovulation by intra-uterine plastic devices in Indian water buffaloes;Buch,1964
3. Interference with reproduction in water buffalo by intra-uterine devices;Janakiraman;J. Reprod. Fert.,1970
4. Principles and procedures of statistics;Steel,1960
5. Antifertility effect of the intra-uterine foreign body;El-Sahwi;Contraception,1970