A method effectiveness and satisfaction levels of couples who are using the Billings Ovulation Method of natural family planning in Southern and Western Puerto Rico Brennan, Joseph William creator text bibliography miu Ann Arbor, MI University Microfilms International 1983 monographic eng viii, 154 p. tables. Rev. Joseph W. Brennan. Authorized facsimile, made from the microfilm master copy of the original dissertation submitted to the Catholic University of America in partial fullfillment of the requirements for the degree Doctorate in Social Work. Bibliography : p. 122-137. Family Puerto Rico Natural family planning Puerto Rico Ovulation method Birth control 930301 20160527182716.0 109189