. . . . . . . . "Thirty Years of personnel and placement work at the Carnegie Institute of Technology" . . . . "Thirty years of personnel and placement work at the Carnegie Institute of Technology" . "Thirty years of personnel and placement work at the Carnegie Institute of Technology"@en . . . "Thirty years of personnel and placement work at the Carnegie institute of technology"@en . "Thirty years of personnel and placement work at the Carnegie institute of technology" . . "Thirty years of personnel and placement work at the Carnegie Institute of Technology : Ass. by workers furnished by the National Youth Administration" . . . . . .