Librería Samer Atenea
Kálamo Books
Librería Elías (Asturias)
Librería Kolima (Madrid)
Librería Proteo (Málaga)
Written by one of the most eminent, (if sometimes disputed) historians of the 20th century, this book, originally published in 1939, gives guidance to the would-be historian on historical sources, research and evidence. Although inevitably a product of its time, this volume nonetheless remains one of the most comprehensive guides to historiograhy.