Here is the celebrated scientist's doctoral thesis, the prelude to her receipt of the 1903 Nobel Prize. Curie discusses establishing atomic character of radioactivity from compounds of uranium and thorium; extraction from pitchblende of polonium and radium; isolation of pure radium chloride; determination of atomic weight of radium; and more.
Radio-activity by Ernest Rutherford In this classic 1904 work, Nobel Laureate Ernest Rutherford describes his pioneering experiments and their resolution of the mysteries of radioactivity. 1904 edition.