Although the original description as "personal" correspondence was maintained, please note that some files contain correspondence relating to professional work, projects, and research. This subseries also contains digital correspondence between friends and family.

Includes letters of appointment, and a letter acknowledging and accepting a resignation.

Although the original description as "personal" correspondence was maintained, please note that some files contain correspondence relating to professional work, projects, and research. This subseries also contains digital correspondence between friends and family.

Letter concerns the sale of artwork.

Although the original description as "personal" correspondence was maintained, please note that some files contain correspondence relating to professional work, projects, and research. This subseries also contains digital correspondence between friends and family.

Contains letter possibly written by Ernest Sohn.

Includes correspondence, informational booklets, seminar notes, and notes. Digital correspondence pertains to Golden Box field tests in Argentina and design, testing and production of Housing: CORE.

Although the original description as "personal" correspondence was maintained, please note that some files contain correspondence relating to professional work, projects, and research. This subseries also contains digital correspondence between friends and family.

Includes photographs.

Includes personal correspondence between Cohen family members and close friends. Much of the correspondence occurs during periods of international travel. Correspondence in digital format (mainly word processing files) is well represented between the years 1993 to 1998.