Robert E. Johnston Chapman, L. D., Hasnah, M. O., Oltulu, O., Zhong, Z., Mollenhauer, J. M., C., K., … Sayers, D. (2003). Diffraction enhanced x-ray imaging of articular cartilage. Washington, DC: U.S. Patent and Trademark Office. Pisano, E. D., Johnston, R. E., Chapman, D., Geradts, J., Iacocca, M. V., Livasy, C. A., … Thomlinson, W. C. (2000). Human breast cancer specimens: Diffraction-enhance imaging with histologic correlation - Improved conspicuity of lesion detail compared with digital radiography. RADIOLOGY, 214(3), 895–901. https://doi.org/10.1148/radiology.214.3.r00mr26895 Davis, N. L., Willis, L. V., Johnston, R. E., & Smith, J. F. (1993). cDNA clone coding for Venezuelan equine encephalitis virus and attenuating mutations thereof. Washington, DC: U.S. Patent and Trademark Office. ALLISON, R., JOHNSTON, R. E., & DOUGHERTY, W. G. (1986). THE NUCLEOTIDE-SEQUENCE OF THE CODING REGION OF TOBACCO ETCH VIRUS GENOMIC RNA - EVIDENCE FOR THE SYNTHESIS OF A SINGLE POLYPROTEIN. VIROLOGY, 154(1), 9–20. https://doi.org/10.1016/0042-6822(86)90425-3