William H. Graham, 52, a retired teacher of French and German at Winston Churchill High School in Potomac and a bass-baritone who made many appearances in the Washington area, died of hemophilia March 1 at Georgetown University Hospital.

Mr. Graham was born in Washington and lived in the city all of his life. He graduated from Coolidge High School and received bachelor's and master's degrees at the University of Maryland. He went to the Rome Opera on a Fulbright Scholarship and made his operatic debut in Verdi's "The Masked Ball."

As a singer in Washington, Mr. Graham had roles with the Washington Opera Society and the Washington Civic Opera. They included the part of Andrea in the world premier of "Beatrix Cenci" by Ginastera, which opened the Kennedy Center Opera House in 1971. In the same year he sang the role of Alidoro in Rossini's "La Cenerentola" in a production of the National Symphony Orchestra at the Kennedy Center Concert Hall.

For the past 12 years, Mr. Graham had been the bass soloist at the Navy Chapel in Washington. He also had been a soloist at many other churches, including the Washington Cathedral.

Mr. Graham began his teaching career when he returned here from Italy. He taught French and Latin at the Landon School for Boys from 1959 to 1967. He then joined Sidwell Friends School, where he taught French and Italian. He became a teacher in the Montgomery County school system in 1970 and taught at Churchill until he retired for reasons of health in 1985.

For many years Mr. Graham produced and sang in annual benefits for the Washington chapter of he National Hemophilia Foundation.

Survivors include his wife, Mary, and two sons, Daniel Patrick and Brian Andrew, all of Washington.