The following links will take you to many of the essential guides, tools, and other technical resources for prevention and response to gender-based violence in humanitarian settings:
IASC Guidelines for Gender-based Violence Interventions in Humanitarian Settings
Sexual and Gender-Based Violence against Refugees, Returnees and Internally Displaced Persons
IASC Gender Handbook in Humanitarian Action
Clinical Management of Rape Survivors (2005 version)
Population Reports: Ending Violence Against Women
WHO Ethical and Safety Recommendations for Interviewing Trafficked Women