The U.S. Government Publishing Office (GPO) intends to gather information from vendors and organizations with experience in the production, packaging, and mailing of questionnaire booklets, letters, i... The U.S. Government Publishing Office (GPO) intends to gather information from vendors and organizations with experience in the production, packaging, and mailing of questionnaire booklets, letters, inserts, business reply envelopes, and outgoing envelopes. Responses are sought from interested and responsible vendors for the purpose of developing requirements for the future production of printed Census products.