@article{doi:10.1001/archinte.1969.00300140123040,
title = {American heart association monograph, no. 20: Cooperative study on cardiac catheterization.},
journal = {Archives of Internal Medicine},
volume = {123},
number = {4},
pages = {477-478},
year = {1969},
doi = {10.1001/archinte.1969.00300140123040},
URL = { + http://dx.doi.org/10.1001/archinte.1969.00300140123040},
eprint = {/data/Journals/INTEMED/15733/archinte_123_4_040.pdf}
}