42 1 10 THE World book encyclopedia, volume 1 : KOBASA, Paul A. [ed.] Additional Author mixed material Chicago World Book 2007 THE World book encyclopedia, volume 2 : KOBASA, Paul A. [ed.] Additional Author mixed material Chicago World Book 2007 THE World book encyclopedia, volume 3 : KOBASA, Paul A. [ed.] Additional Author mixed material Chicago World Book 2007 THE World book encyclopedia, volume 4 : KOBASA, Paul A. [ed.] Additional Author mixed material Chicago World Book 2007 THE World book encyclopedia, volume 5 : KOBASA, Paul A. [ed.] Additional Author mixed material Chicago World Book 2007 THE World book encyclopedia, volume 6 : KOBASA, Paul A. [ed.] Additional Author mixed material Chicago World Book 2007 THE World book encyclopedia, volume 7 : KOBASA, Paul A. [ed.] Additional Author mixed material Chicago World Book 2007 THE World book encyclopedia, volume 8 : KOBASA, Paul A. [ed.] Additional Author mixed material Chicago World Book 2007 THE World book encyclopedia, volume 9 : KOBASA, Paul A. [ed.] Additional Author mixed material Chicago World Book 2007 THE World book encyclopedia, volume 10 : KOBASA, Paul A. [ed.] Additional Author mixed material Chicago World Book 2007