Tonu Parming, 57, a former associate professor of sociology at the University of Maryland who served on the faculty at College Park from 1974 to 1988, died Oct. 30 at a hospital in Toronto of complications related to a stroke following heart bypass surgery.

Dr. Parming was born in Parnu, Estonia. He fled to Germany with his family following the Soviet Union's annexation of the Baltic States early in World War II and spent the war years in Germany.

He immigrated to the United States in 1948 and grew up in New Milford, N.J. He attended Princeton University and then served in a U.S. Army Special Forces unit in Vietnam, where he led a project to build a schoolhouse for a Montagnard tribe.

In 1967 he returned to Princeton, where he graduated in 1969 as a member of the class of 1964. He studied in Finland for one year on a Fulbright scholarship and then received a doctorate in sociology from Yale University.

During his years on the faculty at the University of Maryland, Dr. Parming also was director of Soviet and East European studies at the State Department's Foreign Service Institute. He was a visiting professor at the University of Toronto.

He was president of the Washington Special Forces Association and in 1988 was chairman of the conference of the Association for the Advancement of Baltic Studies at the University of Maryland.

In 1988 he moved to Toronto, where he was president of the Estonian Publishing Company and editor of the Estonian newspaper Meie Elu.

His marriage to Marju Rink ended in divorce.

Survivors include his wife, Asta Lokk Parming, and their two children, Vieko and Talvi, all of Toronto; his parents, Bernhard and Salme Parming of New Milford, N.J.; a brother, Priit Parming of Bergenfield, N.J.; and two sisters, Anu Ojamaa of New Jersey, and Kaja Weeks of Silver Spring.