The Physical Review, Volume 75, Second Series, Number 1, January 1, 1949, published for the American Physical Society, black cloth spine with gold text, black marbled boards, stamp to title page, first edition, first impression of Freeman John Dyson's paper, Radiation Theories of Tomonaga, Schwinger, and Feynman [p.486 - p.502], the first paper to demonstrate the equivalence between Richard Feynman's diagram-based approach to quantum electrodynamics and Julius Schwinger and Sin-Itiro Tomonaga's operator method approach, first edition, first impression of Norman M. Kroll and Willis E Lamb's, paper, On the Self-Energy of a Bound Electron [p.388-p.398] representing a major step in the research, which 6 years later, would result in Lamb being awarded the Nobel prize in Physics in 1955 for research related to his discovery of the Lamb Shift. Norman M. Kroll was an American theoretical physicist best known for his work in Quantum Electrodynamics