R. A. Packer

Williams, L. E., & Packer, R. A. (2003). Association between lymph node size and metastasis in dogs with oral malignant melanoma: 100 cases (1987-2001). JOURNAL OF THE AMERICAN VETERINARY MEDICAL ASSOCIATION, 222(9), 1234–1236. https://doi.org/10.2460/javma.2003.222.1234