@article{Alder:1978ri, author = "Alder, J. C. and others", title = "{Measurement of the Polarization Parameter in $\pi^- p$ Scattering at 291.5-{MeV} and 308-{MeV}}", reportNumber = "SIN-PR-78-006", doi = "10.1007/BF02776253", journal = "Lett. Nuovo Cim.", volume = "23", pages = "381", year = "1978" }