TY - RPRT TI - Amphibian cell culture: Permanent cell line from the bullfrog ( Rana catesbeiana ) AU - K. Wolf AU - M. C. Quimby PY - 1964 DO - 10.1126/science.144.3626.1578 UR - https://pubs.usgs.gov/publication/1014147 ID - 1014147 ER -