کتاب های Robert Clawson

Russian helmets. from kaska to stalshlyem 1916-2001
Robert W. Clawson, 2002
Russian Helmets: from Kaska to Stalshlyem 1916-2001
Robert Clawson, 2002
Stahlhelm Evolution of the German Steel Helmet
Floyd R. Tubbs with the assistance of Robert W. Clawson