. ▁ ▁References ▁▁ ▁Category : Th am n oph is ▁Category : Re pt iles ▁described ▁in ▁ 1 8 6 3 ▁Category : Re pt iles ▁of ▁Mexico <0x0A> </s> ▁Encyclopedia ▁Amer icana ▁is ▁one ▁of ▁the ▁largest ▁general ▁en cyc loped ias ▁in ▁American ▁English ▁language . ▁Following ▁the ▁ac quisition ▁of ▁Gro lier ▁in ▁ 2 0 0 0 , ▁the ▁en cyc lopedia ▁has ▁been ▁produced ▁by ▁Sch ol astic . ▁ ▁The ▁en cyc lopedia ▁has ▁more ▁than ▁ 4 5 , 0 0 0 ▁articles , ▁most ▁of ▁them ▁more ▁than ▁ 5 0 0 ▁words ▁and ▁many ▁running ▁to ▁considerable ▁length ▁( the ▁" Un ited ▁States " ▁article ▁is ▁over ▁ 3 0 0 , 0 0 0 ▁words ). ▁The ▁work ' s ▁coverage ▁of ▁American ▁and ▁Canadian ▁ge ography ▁and ▁history ▁has ▁been ▁a ▁traditional ▁strength . ▁Writ ten ▁by ▁ 6 , 5 0 0 ▁contrib utors , ▁the ▁Encyclopedia ▁Amer icana ▁includes ▁over ▁ 9 , 0 0 0 ▁bibli ograph ies , ▁ 1 5 0 , 0 0 0 ▁cross - re ferences , ▁ 1 , 0 0 0 + ▁tables , ▁ 1 , 2 0 0 ▁maps , ▁and ▁almost ▁ 4 , 5 0 0 ▁black - and - white ▁line ▁art ▁and ▁color ▁images . ▁It ▁also ▁has ▁ 6 8 0 ▁fact box es . ▁Most ▁articles ▁are ▁signed ▁by ▁their ▁contrib utors . ▁ ▁Long ▁available ▁as ▁a ▁ 3 0