He described Booth's systematic and analytical use of a homemade card catalogue. Groddeck initiated the compilation of an alphabetic and later a systemic card catalogue. He is credited with establishing the first card catalogue at the Queen's Library. Team Air Force headed for the card catalogue, followed by Team Southie Boys. In a large library, the card catalogue often filled a large room. Later, a card catalogue of the author, title and cross-reference were prepared.