perfect design thanks <a href=" http://luisamartelo.com/index.php/apa-research-papers/ ">7 steps to write a good research paper</a> Individual pieces of donated art can also carry contractsthat bar their sale, Erickson said. Robert Hudson Tannahill, thelate Detroit art collector, donated 470 objects, but his willstipulates that if the DIA sells any piece, the entirecollection must be offered to another museum, Erickson said.