| RefNo | Title | Date |
| GLB/42/39 | Secretary to Sir John McMichael, British Postgraduate Medical Federation | 20 August 1969 |
| GLB/45/18 | John McMichael, British Postgraduate Medical Federation to Brown | 15 August 1969 |
| HB/6/28 | Letter from John McMichael, British Postgraduate Medical School, University of London, Hammersmith Hospital, Ducane Rd, Shepherd's Bush, to Henry Barcroft, Physiological Laboratory, Queen's University Belfast | 25 April 1946 |
| HB/13/15 | Letter from John [McMichael], 52 Popes Grove, Twickenham, to Henry Barcroft | 9 November 1946 |
| HB/4/9 | Letter from John [McMichael], Twickenham, to Henry [Barcroft] | 5 February 1946 |
| HB/12/49 | Letter from John McMichael, British Postgraduate Medical School, Hammersmith Hospital LCC, Ducane Road, Shepherd's Bush London, to Henry Barcroft, Queen's University, Belfast | 28 October 1946 |
| HB/25/5 | Letter from John [McMichael], Postgraduate Medical School of London, to Henry Barcroft, Queen's University Belfast | 3 December 1947 |
| HB/23/7 | Letter from J McMichael, British Postgraduate Medical School, Hammersmith Hospital, London, to Henry Barcroft | 6 October 1947 |
| HB/3/29 | Postcard from [John McMichael], British Postgraduate Medical School, University of London, to Henry [Barcroft], Queen's University, Belfast | 21 January 1946 |
| HB/13/5 | Letter from John McMichael, British Postgraduate Medical School, University of London, Hammersmith Hospital LCC, Ducane Road, Shepherd's Bush, London W12, to [Henry Barcroft] | 4 November 1946 |
| JV/11/7/134 | Letter from Sir John McMichael, FRS to Sir John Vane | 3 January 1984 |
| IM/003580 | Pickering, Sir George White and McMichael, Sir John | July 1972 |
| RR/65/14 | Referee's report by Major Greenwood, on a paper 'The lung volume and its subdivisions in normal males' by E A Aslett, P D'arcy Hart and John McMichael | October 1938 |
| HB/12/18 | Letter from John McMichael, British Postgraduate Medical School, Hammersmith Hospital, Ducane Road, Shepherd's Bush, London W12, to Henry Barcroft | 10 October 1946 |
| HB/22/16 | Letter from John McMichael, British Postgraduate Medical School, University of London, Hammersmith Hospital, to Henry Barcroft | 19 September 1947 |
| HB/3/39 | Letter from John McMichael, British Postgraduate Medical School, University of London, Hammersmith Hospital LCC, Dunace Road, Shepherd's Bush, London W12, to Henry Barcroft, Queen's University, Belfast | 29 January 1946 |
| IM/GA/AR/7380 | McMichael, Sir John | nd |
| IM/GA/WRS/9003 | McMichael, Sir John | nd |
| RR/65/119 | Referee's report by Major Greenwood, on a paper 'Determination of lung volume: a simple constant volume modification of Christie’s method' by F J C Herrald and John McMichael | 1938 |
| EC/1957/11 | McMichael, Sir John: certificate of election to the Royal Society | |
| IM/002911 | McMichael, Sir John and Pickering, Sir George White | July 1972 |