Pfeffer, H. (Editor), "Information Retrieval Among Examining Patent Offices", Thomson Book Co., Wash., D.C. (1967).

Languages mentioned

• HAYSTAQ {1959} Restricted input querying language

• Marden, E. C., and Koller, H. R., (1964) Marden, E. C., and Koller, H. R., "The Present Status of Project HAYSTAQ"