P. Alexander & R. Halpern 
Racializing Class, Classifying Race [PDF ebook] 
Labour and Difference in Britain, the USA and Africa

The ten essays in this book explore the intersection of race and class in the study of labour on three continents. Leading scholars examine the way in which working-class identities took shape and changed over time in a variety of settings from the sea ports of southern Africa to the copper mining region of the American Southwest.