Past Meetings: IRDG 1 – 99
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- IRDG 99 (21 October 1982 Smith Kline and French )
- IRDG 98 (19 May 1982 The Royal Institution)
- IRDG 97 (18 April 1982 Royal Holloway College)
- IRDG 96 (17 December 1981 King’s College, London)
- IRDG 95 (21 October 1981 BP, Sunbury)
- IRDG 94 (1 April 1981 University of Southampton)
- IRDG 93 (17 December 1980 King’s College, London)
- IRDG 92 (27 October 1980 ICI, Welwyn Garden City)
- IRDG 91 (16 April 1980 Polytechnic of Wales)
- IRDG 90 (19 December 1979 King’s College, London)
- IRDG 89 (27 September 1979 ICI, Harrogate)
- IRDG 88 (18 April 1979 Newcastle University)
- IRDG 87 (19 December 1978 King’s College, London)
- IRDG 86 (9 November 1978 Kodak, Harrow)
- IRDG 85 (16 December 1977 King’s College, London)
- IRDG 84 (27 September 1977 BP, Sunbury)
- IRDG 83 (4 April 1977 Polytechnic of Wales)
- IRDG 82 ( 17 December 1976 King’s College, London)
- IRDG 81 (28 September 1976 Warren Spring Laboratory)
- IRDG 80 (7 April 1976 University of Southampton)
- IRDG 79 (17 December 1975 King’s College, London)
- IRDG 78 (23 September 1975 Kodak, Harrow)
- IRDG 77 (1 July1975 Kingston Polytechnic)
- IRDG 76 (10 June 1975 Kingston Polytechnic)
- IRDG 75 (17 December 1974 King’s College, London)
- IRDG 74
- IRDG 73
- IRDG 72
- IRDG 71 (10 April 1973 Kingston Polytechnic)
- IRDG 70 (15 December 1972 King’s College, London)
- IRDG 69 (19 September 1972 Queen Elizabeth College)
- IRDG 68 (12 July 1972 University of Bradford)
- December 1971 King’s College, London
- December 1970 King’s College, London
- December 1969 King’s College, London
- December 1968 King’s College, London
- December 1967 King’s College, London
- IRDG 51 (December 1966 King’s College, London)
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- IRDG 50 (23 September 1966 National Physical Laboratory)
- December 1965 King’s College, London
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- April 1965 Queen Mary College
- December 1964 King’s College, London
- March 1964 University of Reading
- December 1963 King’s College, London
- August 1963 Newcastle on Tyne
- December 1962 King’s College, London
- September 1962 University of Nottingham
- March 1962 National Physical Laboratory
- December 1961 King’s College, London
- October 1961 University of Reading
- April 1961 University of Swansea
- December 1960 King’s College, London
- 29 September 1960 University of Cambridge
- March 1960 University of Oxford
- December 1959 King’s College, London
- 1959 Dublin
- 1958 Oxford
- 1954 King’s College, London
- 12 Aug ?? Newcastle
- IRDG 2 26 May 1950 King’s College, London
- IRDG 1 20 January 1950 Royal Technical College, Glasgow