Checked content


RogerTractorLarge.jpg(450 × 313 pixels, file size: 39 KB, MIME type: image/jpeg)
English: Roger Bartelt on an Allis-Chalmers WD tractor, USA. Note the absence of any rollover protection system.
Date before 1997
Source Fermi Lab history project –
Author Unknown
( Reusing this file)
Public domain This work is in the public domain in the United States because it is a work prepared by an officer or employee of the United States Government as part of that person’s official duties under the terms of Title 17, Chapter 1, Section 105 of the US Code. See Copyright.

Note: This only applies to original works of the Federal Government and not to the work of any individual U.S. state, territory, commonwealth, county, municipality, or any other subdivision. This template also does not apply to postage stamp designs published by the United States Postal Service since 1978. (See 206.02(b) of Compendium II: Copyright Office Practices). It also does not apply to certain US coins; see The US Mint Terms of Use.

Great Seal of the United States (obverse).svg
This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights.
The following pages on Schools Wikipedia link to this image (list may be incomplete):

What is Schools Wikipedia?

Wikipedia for Schools is designed to make learning fun and easy. More than 2 million people benefit from the global charity work of SOS Children, and our work in 133 countries around the world is vital to ensuring a better future for vulnerable children. There are many ways to help with SOS Childrens Villages.