1. Weight gain in pregnancy
2. D. Baird (1969 ): Combined Textbook of Obstetrics and Gynaecology , 8th edition . Livingstone, Edinburghp.112 .
3. Weight Changes and Water Balance in Normal and Toxic Pregnancy
4. D. Craddock (1969 ): Obesity and Its Management , Livingstone, Edinburghp.52 .
5. I. Donald (1969 ): Practical Obstetric Problems , 4th edition . Lloyd-Luke, Londonp.19 .