1. Correlated Selection for Motility and Sex-Incompatibility in Escherichia coli K-12 Creator: Richter, AlanLederberg, JoshuaSkaar, Palmer David Date: April 1957 Publisher: National Academy of Sciences (U.S.) Genre: Articles
2. A Binary Mutability System in Escherichia coli Creator: Skaar, Palmer David Date: May 1956 Publisher: National Academy of Sciences (U.S.) Genre: Articles