M

Major League Players Association, 1958-1985, inclusive

Box: 27 (Material Type: Mixed Materials)

Manchester and Salford Trades Council, 1930, inclusive

Box: 27 (Material Type: Mixed Materials)

Marine Cooks and Stewards Association of the Pacific Coast, 1941, inclusive

Box: 27 (Material Type: Mixed Materials)

Marine Cooks and Stewards Association of the Pacific Coast, 1944, inclusive

Box: 27 (Material Type: Mixed Materials)

Marine Cooks and Stewards Association of the Pacific Coast I, 1945, inclusive

Box: 28 (Material Type: Mixed Materials)

Marine Cooks and Stewards Association of the Pacific Coast II, 1945, inclusive

Box: 28 (Material Type: Mixed Materials)

Marine Cooks and Stewards Association of the Pacific Coast III, 1945, inclusive

Box: 28 (Material Type: Mixed Materials)

Marine Cooks and Stewards Association of the Pacific Coast, 1946-1951, undated, inclusive

Box: 28 (Material Type: Mixed Materials)

Marine Draftsmen's Association, 1944, inclusive

Box: 28 (Material Type: Mixed Materials)

Marine Firemen's Union, 1952-1977, inclusive

Box: 28 (Material Type: Mixed Materials)

Marine Workers Industrial Union, 1934, inclusive

Box: 28 (Material Type: Mixed Materials)

Maritime Federation of the Pacific, 1940, inclusive

Box: 28 (Material Type: Mixed Materials)

Maritime Industry: Strikes and Struggles, 1936-1961, undated, inclusive

Box: 28 (Material Type: Mixed Materials)

Massachusetts Trade Union Educational League, 1979, inclusive

Box: 28 (Material Type: Mixed Materials)

Master Steam and Hot Water Fitters' Association (Brooklyn, NY), undated

Box: 28 (Material Type: Mixed Materials)

Mechanics Educational Society of America: Constitution and By-laws, 1979, inclusive

Box: 28 (Material Type: Mixed Materials)

Metal Polishers, Buffers, Platers and Helpers International Union, 1943, 1952, inclusive

Box: 28 (Material Type: Mixed Materials)

Metal Spinners and Silver Plated Hollow-ware Workers Union, 1957, inclusive

Box: 28 (Material Type: Mixed Materials)

Metal Workers Union (Brazil), 1986, inclusive

Box: 28 (Material Type: Mixed Materials)

Metro New York Labor Communications Council, 1997-2002, undated, inclusive

Box: 28 (Material Type: Mixed Materials)

Milk Wagon Drivers Unions of Greater Boston Local 380, undated

Box: 28 (Material Type: Mixed Materials)

Miners' Federation of Great Britain I, 1925-1927, undated, inclusive

Box: 28 (Material Type: Mixed Materials)

Miners' Federation of Great Britain II, 1925-1927, undated, inclusive

Box: 28 (Material Type: Mixed Materials)

Musicians' Union (Great Britain), 1947, inclusive

Box: 28 (Material Type: Mixed Materials)