Hook, C$.$ & Ladder, S$.(2019$ Oct $02).$ The evolution of US fire engines in the ${20}^{th}$ century. University of Tennessee Knoxville Press, Knoxville, TN$.$

$($Hook & Ladder, $2019$ Oct $02)$

$($Hook$,$ C$.$ & Ladder, S$.,2019)$

$($University of Tennessee Press, $2019)$

$($Hook & Ladder, $2019)$