9 ▁October ▁ 2 0 0 9 , ▁edited ▁by ▁John ▁B . ▁H att endorf ▁and ▁John ▁W . ▁Kennedy ▁( 2 0 1 0 ) ▁Tw enti eth ▁International ▁Se ap ower ▁Sym pos ium : ▁report ▁of ▁the ▁proceed ings ▁ 1 9 - 2 1 ▁October ▁ 2 0 1 1 , ▁edited ▁by ▁John ▁B . ▁H att endorf ▁and ▁John ▁W . ▁Kennedy ▁( 2 0 1 2 ) ▁ ▁Tw enty - First ▁International ▁Se ap ower ▁Sym pos ium : ▁Report ▁of ▁the ▁proceed ings ▁ 1 6 - 1 9 ▁September ▁ 2 0 1 4 , ▁edited ▁by ▁John ▁B . ▁H att endorf ▁and ▁John ▁W . ▁Kennedy ▁( 2 0 1 5 ) ▁ ▁Tw enty - Second ▁International ▁Se ap ower ▁Sym pos ium : ▁Report ▁of ▁the ▁proceed ings ▁▁ 2 0 - 2 3 ▁September ▁ 2 0 1 6 , ▁edited ▁by ▁John ▁B . ▁H att endorf ▁( 2 0 1 7 ) ▁ ▁Gu ides ▁and ▁registers ▁to ▁manuscript ▁collections ▁at ▁the ▁Naval ▁War ▁College Register ▁of ▁the ▁papers ▁of ▁William ▁L . ▁M ull in ▁compiled ▁by ▁John ▁B . ▁H att endorf ▁( 1 9 8 1 ) ▁Register ▁of ▁the ▁papers ▁of ▁Alfred ▁T . ▁Mah an ▁( 1 9 8 6 ) ▁Register ▁of ▁the ▁papers ▁of ▁William ▁McC art y ▁Little ▁compiled ▁by ▁John ▁B . ▁H att endorf ▁( 1 9 8 9 ) ▁▁ ▁Register ▁of ▁the ▁papers