From the "Nursing Mothers Companion" Appendix B:
hours old - oz per day
24-48 - 4oz
48-72 - 5oz
72-96 - 8oz
96-120 - 12oz
then it is based on weight. There is a table to help you calculate how much milk your baby needs based on his weight. An example is a 7.5lb baby needs 20oz of milk a day.
Hope this helps, your local library probably has the book, it says over 500,000 copies sold.
hugs, Jean