Our aim in preparing the second volume in this series has been to cover the
literature available between mid-January 1968 and mid-January 1969.
The terms of reference are set out as before in the Introductions to Parts I
and 11. Our overall emphasis is the same as that described in the preface to
Volume 1.
Work described in Abstracts of the American Chemical Society Meetings,
in Dissertation Abstracts, or in the patent literature has not been abstracted.
In the preface for Volume 1 we requested comments and advice from
readers. However, because of the delayed distribution of that volume we
have had to prepare this manuscript having received virtually no comments
at all.
It has been useful sometimes to give a reference to work described in
Volume 1 and this is given, for example, in the form (Vol. 1, p. 247).
We thank Drs. 0. S. Chizhov and L. V. Bakinovskii for help with the
translation of Russian papers.