, ▁Paul ▁Ste ward ▁( Editor ), ▁and ▁Elizabeth ▁W ink ler . ▁" H u aut la : ▁Th irty ▁Years ▁in ▁One ▁of ▁the ▁World ' s ▁Deep est ▁C aves ." ▁July ▁ 2 0 0 9 . ▁C ave ▁Books , ▁ 3 0 5 ▁pages , ▁ ▁T abor , ▁James ▁M . ▁Bl ind ▁descent ▁: ▁the ▁quest ▁to ▁discover ▁the ▁deep est ▁place ▁on ▁earth . ▁ 2 0 1 0 ▁Random ▁House . ▁ 3 0 4 ▁pages . ▁ ▁Jew ell , ▁Chris . ▁ 2 0 1 3 ▁" H u aut la ▁expedition , ▁San ▁Ag ust in , ▁Mexico ." ▁National ▁Spe le ological ▁Society ▁News ▁ 7 2 . 6 ▁( J une ▁ 2 0 1 4 ). p ▁ 1 3 - 1 9 . ▁Jew ell , ▁Chris . ▁ 2 0 1 3 ▁" ▁San ▁Ag ust in ▁ 2 0 1 3 ▁exp édition ." ▁Bul letin ▁of ▁Association ▁for ▁mex ican ▁cave ▁studies ▁( AM CS ) ▁n ° 2 5 ▁( 2 0 1 4 ), ▁ 4 1 ▁pages ▁. ▁ ▁External ▁links ▁Pro yect o ▁Es pe le ológ ico ▁S istema ▁Hu aut la ▁( P ES H ) ▁project ▁of ▁the ▁National ▁Spe le ological ▁Society ▁and ▁the ▁US ▁Deep ▁C aving ▁Team , ▁a ▁ 5 0 1 ▁( c ) ▁ 3 ▁non - pro fit ▁Association ▁for ▁Mexican ▁C ave ▁Studies , ▁History ▁ ▁Category :