P. Campbell

Population projections: states, 1995 - 2025.

P. Campbell, 1997, Current population reports. Series P-25, Population estimates and projections.

Institutional Development and Ngos in Africa: Policy Perspectives for European Development Agencies

A. Fowler, B. Pratt, P. Campbell, 1993 .

Evaluating Forecast Error in State Population Projections Using Census 2000 Counts

Paul R. Campbell, P. Campbell, 2002 .