The Excretion of Phenol Red by the Frog, Rana catesbiana Identifier: 10339 Title: The Excretion of Phenol Red by the Frog, Rana catesbiana Author: Roy P. ForsterDartmouth College Date: 1939 Species: Rana catesbeiana (now Lithobates catesbeianus)American bullfrog Type: Bulletin, Report Bulletin: Volume 03 - 1939 Report: 6 Citation “The Excretion of Phenol Red by the Frog, Rana catesbiana,” MDI Biological Laboratory, accessed March 15, 2026, https://digitalarchive.mdibl.org/items/show/2117.Item 10339 Save this item as a PDF file