@misc{1183251, author = {Robert W Penn and Gregory B McKenna}, title = {Physical testing of polymers for use in circulatory assist devices ::first annual report July 1978}, year = {1978}, month = {1978-01-01 05:01:00}, publisher = {, National Institute of Standards and Technology, Gaithersburg, MD}, doi = {https://doi.org/10.6028/NBS.IR.79-1741}, language = {en}, }