"Ford's Freighter Travel Guide & Waterways of the World" by Judith Howard.
19448 Londelius St, Northridge, CA 91324. 818-701-7414 (Updated quarterly)."OAG Cruise & Ferry Guide"
Reed Travel Group, Dunstable, Beds. LU5 4HB, UK. Ph: 01582-600111.
Bi-Monthly list of companies offering worldwide ocean transport for passengers.
Includes crauis, cargo ship and ferry sections."Travel by Cargo Ship" by Cadogan Books
Maritime Global Net
CDC Cruise Ship Sanitation Inspections
Lonely Planet's Thorn Tree Forum