“Historical Timeline for Material Handling”
https://www.mhisolutions-digital.com/mhiq/0425_volume_13__issue_4/MobilePagedArticle.action?articleId=2083560#articleId2083560
DoverMEI “The History of Material Handling Equipment” January 13, 2022
https://dovermei.com/the-history-of-material-handling-equipment/