Series consists of reports created and accumulated by Commission staff and consultants. Reports broadly include working papers prepared by Commission senior staff, studies produced by consultants that were recruited to conduct research for the Commission, and external papers, addresses, and other reference material.

Although most of the records are from 1968 there are a few reports used for reference that date from 1961. The reports contained in this series investigate a wide range of development related issues as well as country-specific information that were discussed by the Commission members and incorporated into their final report delivered in 1969. Each senior staff employed by the Commission was responsible for investigating one of the specific topics under study, such as trade, aid importance, or debt relief. The work of the consultants meanwhile, concentrated on studies of conditions and prospects in individual developing countries. Consultants also studied the history and structure of opinion toward development aid in the major donor countries.

The files containing external reference material are labeled "Miscellaneous - Non-Staff" and contain copies of UN committee reports and concept or study papers (some published and others presumably unpublished) that were produced by other UN family organizations (such as Food and Agriculture Organization [FAO]), academic institutions, and national agencies such as USAID. There are also transcripts of addresses given by government officials and copies of memoranda and papers authored by individuals.

Specific topics of reports in this series include (but are not limited to): aid statistics; foreign aid policy; population control; foreign aid to Colombia; donor assumptions and expectations in Germany; aid philosophy and mechanisms in Japan; and Pakistan growth and development policies.