Holmen School District - Propane Buses https://www.cms4schools.com/news_rss.cfm?detailid=651588&memberid=929 Holmen School District - Propane Buses en-us Greener Rides for Holmen Students https://lacrossetribune.com/news/local/holmen-district-moves-to-propane-powered-buses/article_9d064429-c89b-5b61-aa81-066e68d4327d.html School Bus Fleet: Wisconsin District Sees Savings with 6 New Propane School Buses https://www.schoolbusfleet.com/news/729954/wisconsin-district-sees-savings-with-6-new-propane-school-buses