Bessarabian Census Records
The Emigration from Germany to Russia in the Years
1763-1862 by Dr. Karl Stumpp
This is a classic reference book for German-Russian research. But the data for Bessarabia is weak because much of it was based on original settler lists rather than actual census data. It is available at the GRHS Bookstore, but first check the list of weaknesses for Bessarabian data.
Black Sea German-Russian Census Vol. II (aka "Stumpp Supplement II")
A "must have" for Bessarabia researchers, this book includes censuses for the main Bessarabian villages. Most censuses are from 1835, 1850, and 1859 (although some villages have additional years). Translating and publishing these records was done by GRHS volunteers in partnership with the Bessarbiendeutscher Verein in Stuttgart, Germany.
The Black Sea German-Russian Census Vol. I includes censuses from Odessa-area villages, where many Bessarabian families originated. See the index of surnames in Vol I.
Bessarabian Censuses online
A few censuses held by GRHS are available online.
Bessarabian Censuses at FHL
Most of these censuses from the Kischinev archive were published in the Black Sea G-R Census Vol II, but there are a few that are available on microfilm that GRHS has not published.