Paul Clifton, project manager of the Symbol Sourcebook, compiled a chronology documenting key moments in the development of the project.

Sue Perks interviews Pam Holaday, member of the Symbol Sourcebook team who drew the majority of the symbols.

Sue Perks explains the structure of the Symbol Sourcebook, along with Henry Dreyfuss's thinking behind much of the book's content.

Looking at archival correspondence, Sue Perks charts the wide-reaching, collaborative process Henry Dreyfuss and his team undertook to create the Symbol Sourcebook.