Dovetails and broadaxes: hands–on log cabin preservation

[Ellsworth]

https://www.fs.usda.gov/t-d/pubs/pdfpubs/pdf15232802/1523-2802_Dovetails+Broadaxes_Sec508_08-09-17_WEB_150dpi.pdf

https://www.fs.usda.gov/t-d/php/library_card.php?p_num=1523%202802P