’ ▁Association ▁ 5 2 , ▁ 1 9 8 – 2 0 7 . ▁Sw inn erton ▁H . H . ▁( 1 9 4 3 ) ▁ ▁Be lem n ites ▁from ▁East ▁Green land . ▁Ann . ▁Mag . ▁Nat . ▁Hist . ▁Ser . ▁II ▁ 1 0 ▁( 6 6 ), ▁ 4 0 6 – 4 1 0 . ▁Sw inn erton ▁H . H . ▁( 1 9 3 6 – 1 9 5 5 ) ▁A ▁Mon ograph ▁of ▁British ▁C ret ace ous ▁Be lem n ites . ▁ ▁Lower ▁C ret ace ous . ▁ ▁Pala e ont ographical ▁Society , ▁London ▁ 1 – 5 , ▁ 1 – 8 6 . ▁Sw inn erton ▁H . H . ▁& ▁Kent ▁P . E . ▁( 1 9 4 9 ) ▁The ▁Ge ology ▁of ▁Lincoln shire ▁( Lin coln shire ▁Natural ▁History ▁Bro ch ure ▁No . ▁ 1 .) ▁Lincoln , ▁Lincoln shire ▁Natural ists ' ▁Union ▁ 1 9 4 9 ▁( 2 nd ▁Ed , ▁ 1 9 8 1 ). ▁Sw inn erton ▁H . H . ▁( 1 9 5 8 ) ▁The ▁Earth ▁B ene ath ▁Us ▁Harm ond sw orth : ▁Pel ican ▁. ▁Sw inn erton ▁H . H . ▁( 1 9 6 0 ) ▁F oss ils ▁( New ▁Natural ist ▁Series ). ▁London : ▁Collins . ▁ ▁References ▁ ▁External ▁links ▁ ▁Sw inn erton ▁( 1 9 1 0