The Billings Method
Controlling fertility without drugs or devices
The birth of the pill
How four crusaders reinvented sex and launched a revolution
The book of nature
containing information for young people who think of getting married : on the philosophy of procreation and sexual intercourse, showing how to prevent conception and to avoid child-bearing : also, rules for management during labor and child-birth
The bufo reaction
A review illustrated by 700 cases
The Cavimeter