American Society of Clinical Oncology
Clinical practice guidelines for breast cancer survivors, including follow-up examinations, mammography and use of adjuvant therapy.

American Society of Clinical Oncology/American Cancer Society  
Guideline for survivorship care for primary care providers. 

National Cancer Institute
Information, resources, and links pertaining to breast cancer survivorship.

National Comprehensive Cancer Network (NCCN) Guidelines
Breast cancer follow-up guidelines; available for free, but registration required.

The Pink Ribbon Survivors Network
Non-profit organization providing online resources on breast cancer survivorship, including a virtual library for primary care providers.