|Village travel in Sri Lanka|
|Designing and making the trailer|
|Is it sustainable technology?|
|Making the most of the trailers|
|Country: Sri Lanka|
A really useful introductory site with lots of information on using bikes to carry cargo. Although America, gives plenty of specifications, references etc.
Another general site on different trailers for both people and cargo.
One man's interesting experience of trying to design his own trailer.
Another useful introductory site on how bikes can be used to make a living.