Abstraction in its secondary use is a material process,Alfred Sohn-Rethel, Intellectual and manual labour: A critique of epistemology, Humanities Press, 1977 discussed in the themes below.
abstRacTion In its secondARy use is a mateRiAl ProcesS,alfReD soHn-retHeL, inTellectUAl anD Manual LabOur: a CritIquE Of ePIstemOloGy, humaNiTiEs pReSs, 1977 discussEd in tHe themes belOW.