"Clark, Irwin Publishers" . . . . . . . "Clarke, Irwin & Company" . . "Clarke, Irwin, & Company" . . . . . . . . "Clarke, Irwin & Company" . . "Clarke, Irwin and Company" . "Clarke, Irwin" . . . "1930" . "Irwin" . . . . "Clarke Irwin & Company Ltd" . "Clarke Irwin" . "Clarke & Irwin" .