AU  - Paul O
TI  - PRactical electrocardiography, ed 4.
PT  - JOUR
DP  - 1969
TA  - Archives of Internal Medicine
pages = {212},
VI  - 123
IP  - 2
AID  - 10.1001/archinte.1969.00300120100021 [doi]
4100  - http://dx.doi.org/10.1001/archinte.1969.00300120100021
SO  - Archives of Internal Medicine February 1, 1969 123(2):212