1. The Oxford-Kew ozone sonde
2. 1966 ‘Two years' regular ozone soundings over Boulder, Colorado,’ N.C.A.R. Tech. Notes.
3. , and 1970 ‘Regular ozone observations at Thalwil, Switzerland and at Boulder, Colorado,’ Laboratorium für Atomospharen physik, E.T.H. Zürich.
4. 1964 ‘Ozone observations over N. America,’ Vol. 1. A.F.C.R.F.