The US Army Noncommissioned Officer Corps: A Selected Bibliography is a 1998 The Information Management Support Center list of sources.

The Noncommissioned Officers of the US Army-Their Changing Role and Status from 1775 to 1783 is a 1983 article.

Noncommissioned Officers Bibliography is a 2020 Ibiblio list of sources related to the history and training of NCOs.

Dan Elder Collection of Key Events Relating to ETO Training is a 2016 timeline written by Dan Elder about Army training.

What’s Happened to the NONCOM is a 1941 Infantry Journal article about how the Noncommissioned Officer has changed over time.

The Noncommissioned Officer the Backbone of the Army is a 1926 article written by Robert L. Bacon about NCOs.

The Three Meter Zone Email is a 1998 Presidio Press email between Robert V. Kane and Dan Elder about the Three Meter Zone.