The sound recordings are digitized from various formats including cassette tapes, open-reel tapes and phonograph records. Recordings include Muskie's speeches and other public remarks, including question-and-answer sessions, press conferences, radio and television interviews and news broadcasts, campaign spots for broadcast over radio or television, and congressional hearings. This selection of recordings is relevant to Muskie's environmental work over his career but may include other topics if the speaking engagement included other topics.

SC0211 - Interview with Bill Monroe - Muskie speaks on FBI's report on Earth day, FBI surveillance of public and Muskie

SC0037 - Speech - ESM Excerpts from remarks at United Auto Workers convention, Republican convention policies and unemployment

SC0048 - Press conference - Oil import policies, postage prices, 1972 campaign, Supreme Court nomination, Post Office reorganization, and pollution

SC0044 - Press conference - ESM Unidentified and incomplete Press conference on environmental protection legislation, campaign finances and practices, Vietnam, environmental controls, sugar beet industry

SC0052 - Speech followed by Q & A session - ESM on World's resources, environmental crisis, social and economic problems, national priorities and values

SC0064 - Speech - Part of speech on environmental quality to conference of organization that sounds like "NAYCO" [National Association of County Officials]