Since 1972 hundreds of thousands of couples have learned the Sympto-Thermal Method of Natural Family Planning with the help of this book, which has been referred to as "the bible of NFP." This manual explains in a very logical & easily understood manner the practice of spacing or achieving pregnancy by using the primary & secondary signs that provide an informed awareness of a woman's fertility or infertility. Various studies have shown that well-instructed couples can achieve a 99% effectiveness level. In addition The Art of Natural Family Planning provides the reader with help & advice for couples of marginal fertility who are seeking pregnancy & possible helps for irregular cycles & pre-menstrual tension. Over 200,000 copies sold. Also available in Spanish. $8.95 plus $3.00 postage. Standard discounts to distributors & bookstores. Special library discounts. Write or call for details: CCL, PO Box 111184, Cincinnati, OH 45211, (513) 661-7612.