The collection is divided into eleven series:

FARM INCOME TAX RECORDS. 1942-1966. This series contains accounting information for federal income taxes and farm business analyses.

JOURNALS. 1948-1965. This series contains journals consisting of income and expense accounts with some subsidiary ledgers.

DIARIES. 1931-1979. This series contains mainly diaries of George Bitzer and one diary of Tula Bitzer.

MISCELLANEOUS. 1921-1968. This series contains various items such as correspondence, federal income tax forms, Michigan Sugar Company Contracts, Road Maps, Farmer's Bulletins, Worker's Compensation Forms plus many others.

RECEIPTS. 1942-1967. This series contains insurance, investment and property tax receipts.

ESTATE RECORDS. 1868-1953. This series contains estate records between George Bitzer and Hermann and Martha Bizter.

LUTHERAN BUND RECORDS. 1917-1938, undated. This series contains records of the Lutheran Bund of Michigan which was a fraternal beneficiary association organization. The organization would provide aide to its members in the event of illness or death. These records contain the constitution of the Bund, annual reports, memos, meeting minutes, and death notices and payment slips.

OVERSIZED MATERIALS. 1905-1961. This series contains records a Tuscola County (Mich.) road map, confirmation certificate, and marriage certificate.

POSTCARDS.

PHOTOGRAPHS.

ELECTRONIC RESOURCES. This series includes digitized photographs, scans of hand written documents, and digital text documents about the Bitzer family.