Franklin P. Huddle, 66, a senior specialist in materials policy at the Congressional Research Service of the Library of Congress, died of cancer May 30 at Fairfax Hospital.

Dr. Huddle, who lived in Alexandria, joined the old Legislative Reference Service at the Library in 1967. He was named a specialist in systems analysis and goals in 1970 and a senior specialist in science and technology in 1973.

The Congressional Research Service, the successor to the Legislative Reference Service, is organized to provide information for members of Congress. Projects on which Dr. Huddle worked over the years included "Technical Information for Congress," which was used in connection with the Techology Assessment Act of 1972, and "Science, Technology and American Diplomacy," which was used in connection with the Foreign Relations Authorization Act of 1979. Title V of that act directs the president and the secretary of state to coordinate science, technology and foreign policy.

Dr. Huddle also coordinated information that played a role in the establishment of the National Commission on Materials Policy in 1970 and the National Commission on Supplies and Shortages in 1974.

A native of New London, Conn., Dr. Huddle grew up in Groton, Conn.He earned a bachelor's degree at the University of Arizona and then became an English instructor at Brown University, where he earned a master's degree in 1939. He worked briefly as a reporter for The Providence Journal and then became director of the Brown University News Bureau.

In 1943, he moved to the Washington area and worked for Editorial Research Reports. He worked briefly for the Kiplinger newsletters and then began his government career in 1947 as an assistant in the office of the secretary of defense. His work at Defense concerned strategic materials, stockpilling and arms control.

In 1962, he moved to California and worked for the Hughes Aircraft Co. in Fullerton. He took leave from that job to act as a consultant in a study of national materials policy for the executive office of the president. He also lectured at California State College at Fullerton.

In 1965, he earned a doctorate in government at The American University. He returned to this area from California in 1967 to begin his work at the Library of Congress. He also lectured at American University.

At the time of his death, Dr. Huddle was coordinating the sixth Henniker Conference on Materials Policy, which is to be held this July. The conference will discuss a national materials policy. Dr. Huddle had organized the five previous Henniker Conferences.

Dr. Huddle was a fellow of the American society for Metals and a member of the American Academy of political and Social Science, the Academy of Political Science, the American Society for Public Administration and the Cosmos Club.

Survivors include his wife, the former Claire Scott, of Alexandria; two sons, Franklin P. Jr. (Pancho), a Foreign Service officer stationed in Katmandu, Nepal, and David, of Summit Point, W. Va.; three daughters, Eleanor (Norie) Huddle, of Washington, Elizabeth Tagliamento, of Springfield, and Christine Huddle, of Vallejo, Calif.; and three grandchildren.