Construction of infrastructure, a pre-requisite for sustained socioeconomic growth, often requires acquisition of land and, therefore, physical relocation and economic displacement of people. If such impacts, collectively characterized as involuntary resettlement, are not identified and adequately mitigated, some already vulnerable populations are likely to be further impoverished, thereby undermining development objectives. This Sourcebook clarifies many policy and technical issues that confront resettlement policymakers and practitioners. It provides guidance on resettlement design, implementation, and monitoring, and it discusses resettlement issues particular to development projects in different sectors.