- See Larder D.F. A dialectical consideration of Butlerov's theory of chemical structure Ambix 1971 18 26 48
- Russell , C.A. 1971 . The history of valency Leicester
- Russell , C.A. 1971 . The history of valency 143 – 144 . Leicester
- The contrasting responses of Laurent and Gerhardt to the breakdown of the principle that constitution could be inferred from reactions are examined in my forthcoming Laurent, Gerhardt and the philosophy of chemistry Historical studies in the physical sciences 6
- Russell . 1971 . The history of valency 70 – 70 . Leicester
- Fisher , N.W. 1974 . Kekulé and organic classification . Ambix , 21 : 29 – 52 .
Annals of Science
Volume 33, 1976 - Issue 3