DELAWARE & HUDSON D&H RR. OFFICIAL GUIDES: 1868,1870,1877,1878,1881,1889,1891,1893,1895,1910, 1920, 1930, 1933, 1936, 1937, 1940, 1941, 1945 (2 issues), 1946, 1948 (2 issues), 1952, 1953, 1954, 1955 (2 issues), 1956, 1957, 1958 (2 issues), 1960, 1962, 1963, 1965, 1966 (2 issues), 1967, 1968 (2 issues), 1969 (2 issues).
