Librería Samer Atenea
Kálamo Books
Librería Perelló (Valencia)
Librería Elías (Asturias)
Librería Kolima (Madrid)
Librería Proteo (Málaga)
'Some Famous Problems of the Theory of Numbers and in particular Waring's Problem' was a lecture delivered at the University of Oxford in 1920 by G.H. Hardy, M.A., F.R.S.