Folders B23.1-B.23.6: correspondence, MS. notes and corrected typescripts of the Introduction and Values for Volumes I-IV of the Dictionary.

Folder B.23.1: Miscellaneous correspondence, calculations and related papers.

Folder B.23.2: Introductions for Volumes I and II. Correspondence, MS., typescript, working papers.

Folder B.23.3: Values for Volume I. Correspondence, working papers, calculations, charts.

Folder B.23.4: Values for Volume II. Correspondence and calculations.

Folder B.23.5: Introductions and Values for Volumes III and IV. Correspondence, comments and evaluations from colleagues after distribution of Volume I, MS., typescript, working notes, calculations.

Folder B.23.6: Values for Volume III. Calculations, typescript of introduction to section.

Folder B.23.7: Folder of correspondence, typescripts and papers regarding publication of the Dictionary by Pergamon Press with the title Dictionary of [pi]-electron Calculations. Coulson collaborated with A. Streitweiser on this publication.

The folder includes correspondence regarding grant from I.C.I. towards preparation of the Dictionary.