Are they from the City collection or are they Technic?
Technic bricks are different and have lots of holes in them to place axels and moving parts. Have a look on Lego.com but sounds like they are not from current range, therefore you should look at
www.worldbricks.com and can search by year, name or model no. Each years catalogue is there. I buy Lego from ebay so if you want to send me some pics I could have a look for you.
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