1. Calculation of workers wages Collection: Early 20th Century Engineering Lantern Slides Set: Line & Staff Location: unknown Date: undated Format: Image Agent: unknown
2. Calculation of workers wages Collection: Early 20th Century Engineering Lantern Slides Set: Line & Staff Location: unknown Date: undated Format: Image Agent: unknown
3. Percentage of satisfactory employees placed on the job Collection: Early 20th Century Engineering Lantern Slides Set: Line & Staff Location: unknown Date: undated Format: Image Agent: unknown
4. Employment status form Collection: Early 20th Century Engineering Lantern Slides Set: Line & Staff Location: unknown Date: undated Format: Image Agent: unknown
