Census Records - Carroll County
Carroll County MSGenWeb site has the 1840, 1850 and 1860 census records indexed and online for researchers. This is a wonderful website and has a great deal of information for early researchers.
They offer census records in printed publication and on CD. They have the 1840 and 1850 census books for sale for $20 and $40 respectively. They also offer the 1840 and 1850 census records on one CD for $20.