TY - BOOK AU - Witherby Seamanship AU - Witherby Seamanship TI - Chenical tankers : a pocket safety guide T2 - Witherby Seamanship International SN - 9781856093248 AV - VM455 .C54 2006 U1 - VM455 .C54 2006 PY - 2006/// CY - Livingston. PB - Livingston : Witherby Seamanship International ER -