OH Newsletters
- Vol1 No1 October 1952 OH Newsletter
- Vol1 No2 December 1952 OH Newsletter
- Vol2 No1 May 1953 OH Newsletter
- Vol2 No2 September 1953 OH Newsletter
- Vol2 No3 January 1954 OH Newsletter
- Vol3 No1 May 1954 OH Newsletter
- Vol3 No2 September 1954 OH Newsletter
- Vol3 No3 December 1954 OH Newsletter
- Vol4 No1 March 1955 OH Newsletter
- Vol4 No2 September 1955 OH Newsletter
- Vol4 No3 December 1955 OH Newsletter
- Vol5 No1 March 1956 OH Newsletter
- Vol5 No2 September 1956 OH Newsletter
- Vol5 No3 December 1956 OH Newsletter
- Vol6 No1 April 1957 OH Newsletter
- Vol6 No2 September 1957 OH Newsletter
- Vol6 No3 December 1957 OH Newsletter
- Vol7 No2 September 1958 OH Newsletter
- Vol7 No3 December 1958 OH Newsletter
- Vol8 No1 April 1959 OH Newsletter
- Vol8 No2 September 1959 OH Newsletter
- Vol8 No3 December 1959 OH Newsletter
- Vol9 No1 April 1960 OH Newsletter
- Vol9 No2 September 1960 OH Newsletter
- Vol9 No3 December 1960 OH Newsletter
- Vol10 No1 April 1961 OH Newsletter
- Vol10 No2 July 1961 OH Newsletter
- Vol10 No3 December 1961 OH Newsletter
- Vol11 No1 April 1962 OH Newsletter
- Vol11 No2 July 1962 OH Newsletter
- Vol11 No3 December 1962 OH Newsletter
- Vol12 No1 April 1963 OH Newsletter
- Vol12 No2 September 1963 OH Newsletter
- Vol12 No3 January 1964 OH Newsletter
- Vol12 No4 May 1964 OH Newsletter
- Vol13 No2 September 1964 OH Newsletter
- Vol13 No3 January 1965 OH Newsletter
- Vol13 No4 May 1965 OH Newsletter
- Vol14 No1 September 1965 OH Newsletter
- Vol14 No2 January 1966 OH Newsletter
- Vol14 No4 May 1966 OH Newsletter
- Vol15 No1 September 1966 OH Newsletter
- Vol15 No2 January 1967 OH Newsletter
- Vol15 No3 April 1967 OH Newsletter
- Vol16 No1 September 1967 OH Newsletter
- Vol16 No2 January 1968 OH Newsletter
- Vol16 No3 April 1968 OH Newsletter
- Vol17 No1 September 1968 OH Newsletter
- Vol17 No2 January 1969 OH Newsletter
- Vol17 No3 April 1969 OH Newsletter
- Vol18 No2 January 1970 OH Newsletter
- Vol19 No1 September 1970 OH Newsletter
- Vol19 No2 January 1971 OH Newsletter
- Vol19 No3 April 1971 OH Newsletter
- Vol20 No2 January 1972 OH Newsletter
- Vol20 No3 April 1972 OH Newsletter
- Vol21 No1 September 1972 OH Newsletter
- Vol21 No2 January 1973 OH Newsletter
- Vol21 No3 May 1973 OH Newsletter
- Vol22 No1 September 1973 OH Newsletter
- Vol22 No2 January 1974 OH Newsletter
- Vol22 No3 April 1974 OH Newsletter
- Vol23 No1 Septemeber 1974 OH Newsletter
- Vol23 No2 January 1975 OH Newsletter
- Vol23 No3 April 1975 OH Newsletter
- Vol24 No1 September 1975 OH Newsletter
- Vol24 No2 January 1976 OH Newsletter
- Vol24 No3 April 1976 OH Newsletter
- Vol25 No1 September 1976 OH Newsletter
- Vol25 No2 January 1977 OH Newsletter
- Vol25 No3 April 1977 OH Newsletter
- Vol26 No1 September 1977 OH Newsletter
- Vol26 No2 January 1978 OH Newsletter
- Vol26 No3 April 1978 OH Newsletter
- Vol27 No1 September 1978 OH Newsletter
- Vol27 No2 January 1979 OH Newsletter
- Vol27 No3 April 1979 OH Newsletter
- Vol28 No1 September 1979 OH Newsletter
- Vol28 No2 January 1980 OH Newsletter
- Vol28 No3 April 1980 OH Newsletter
- Vol29 No1 September 1980 OH Newsletter
- Vol29 No2 January 1981 OH Newsletter
- Vol29 No3 April 1981 OH Newsletter
- Vol30 No1 September 1981 OH Newsletter
- Vol30 No2 January 1982 OH Newsletter
- Vol30 No3 April 1982 OH Newsletter
- Vol31 No1 August 1982 OH Newsletter
- Vol31 No2 January 1983 OH Newsletter
- Vol33 No1 January 1985 OH Newsletter
- Vol33 No2 September 1985 OH Newsletter
- Vol34 No1 January 1986 OH Newsletter
- Vol34 No2 October 1986 OH Newsletter
- Vol35 No1 February 1987 OH Newsletter
- Vol35 No2 September 1987 OH Newsletter
- Vol36 No1 January 1988 OH Newsletter
- Vol36 No2 September 1988 OH Newsletter
- Vol37 No2 November 1989 OH Newsletter
- Vol38 No1 February 1990 OH Newsletter