Draft Animal Power Forum 200X-2019
DAPNET Forums Archive › Forums › Draft Animal Powered Forestry International › General Discussions › 1957 and 1985 Forest Service papers on horselogging
http://www.fs.fed.us/pnw/pubs/uncaptured/pnw_os_rn-138.pdf
http://www.fire.ca.gov/resource_mgt/downloads/notes/Note95.pdf
Above are 2 links I “borrowed” from Greg Lange’s website