1. Letter from Takehiko Amano to Marshall W. Nirenberg Creator: Amano, Takehiko Date: 8 January 1987 Genre: Letters (correspondence)
2. Letter from Takehiko Amano to Marshall W. Nirenberg Creator: Amano, TakehikoMitsubishi Kasei Seimei Kagaku Kenkyu?jo Date: 12 May 1972 Genre: Letters (correspondence)