00600cam a2200181 4500 373985628 TxAuBib 20190325120000.0 190325s2013||||||||||||||||||||||||und|u 9781492919841 1492919845 TxAuBib Cole, David L., Captain. So You Want to Be A Tugboat Or A Towboat Mariner? : Volume One. Charleston SC : Author, 2013. 20190325. Author's Description of work on a tugboat and towboat.