Feigenbaum, J., & Gross, D. (n.d.). Answering the Call of Automation: How the Labor Market Adjusted to Mechanizing Telephone Operation. National Bureau of Economic Research. https://doi.org/10.3386/w28061

Feigenbaum, James, and Daniel Gross. “Answering the Call of Automation: How the Labor Market Adjusted to Mechanizing Telephone Operation.” National Bureau of Economic Research, n.d. https://doi.org/10.3386/w28061.

Feigenbaum J, Gross D. Answering the Call of Automation: How the Labor Market Adjusted to Mechanizing Telephone Operation. National Bureau of Economic Research;

Feigenbaum, James, and Daniel Gross. Answering the Call of Automation: How the Labor Market Adjusted to Mechanizing Telephone Operation. National Bureau of Economic Research. Crossref, doi:10.3386/w28061.

Feigenbaum J, Gross D. Answering the Call of Automation: How the Labor Market Adjusted to Mechanizing Telephone Operation. National Bureau of Economic Research;