Echocardiographic features of primary pulmonary hypertension.

@article{Goodman1974EchocardiographicFO,
  title={Echocardiographic features of primary pulmonary hypertension.},
  author={David J. Goodman and Donald C. Harrison and Richard Popp},
  journal={The American journal of cardiology},
  year={1974},
  volume={33 3},
  pages={438-43}
}