Bulk Solids Texts

I'm looking for a reliable hard copy text that deals with the design of hoppers for bulk solids, discharge and loading of hoppers, angle of repose, bulk density and other bulk solid characteristics. I have found dozens on the net, but am unwilling to put money on something unless it's precisely what I want. I would prefer the text to start from the base level, a university textbook would be perfect for my use. I studied these subjects in Uni, however we were not perscribed texts and I need something more reliable than Uni notes if I'm going to use it for design purposes.

Thanks in advance for any and all responses.