Non-Fiction
Note that most of these have been whittled down to abstracts and bibliographies. Amber: An archaeolgical overview of European amber trade, relating partially to Etruria.
Planier 3: Regarding the never-entirely-published Planier 3 shipwreck. This ship was a 1st century CE Roman ship with a wide route.
Resin:Regarding the trade and use of Terebinth and Frankincense, terse.
Tin: As above, with tin.