Government Accounting Office report declaring that marriage automatically triggers 1,049 federal laws (January 31, 1997)

Government Accounting Office report updating the number of laws triggered by marriage to 1,138 (January 23, 2004)

Congressional Budget Office report stating that allowing same-sex marriage in all 50 states would have a positive $10 billion impact on the federal budget over the next 10 years. (June 21, 2004)

An Analysis of the Law Regarding Same-Sex Marriages, Civil Unions, and Domestic Partnerships.
American Bar Association (2004)

Gay and Lesbian Families in the United States: Same Sex Unmarried Partner Households, a preliminary analysis of the 2000 census.
Human Rights Campaign (August 22, 2001)

Answers to Questions About Same-Sex Marriage.
Human Rights Campaign (undated)

Why Marriage Equality Matters.
Lambda Legal (2004)

Denying Marriage Harms Families.
Lambda Legal (April 2, 2002)

(How) Does Sexual Orientation of Parents Matter?
Judith Stacy and Timothy J. Biblarz, University of Southern California American Sociological Review (April 2001)