Polyacrylamide gel recording by contact printing.

@article{Pollard1971PolyacrylamideGR,
  title={Polyacrylamide gel recording by contact printing.},
  author={Dr Richard B. Pollard and Jerilyn Prescott},
  journal={Analytical biochemistry},
  year={1971},
  volume={42 1},
  pages={286-8}
}