Typed letter with handwritten additions and postscript from H.J. Muller to Elof Carlson regarding Joravsky's writing on Serebrovsky, Lysenkoism, Isreal Agol, and Soloman Levit, 1962.
Typed letter with handwritten additions from H.J. Muller to Elof Carlson regarding a colleague's (William R. Lee) trip to California and about a Irwin Oster, 1963.