"The Dietrich's Family Tree"

I have begun a family tree research project. I am looking for information on the Dietrich's, the Oates', the Shearer's, and the Bell's.

Any information anyone could give to me I would greatly appreciate.

I have hit a wall with the Dietrich's, especially my husband's grandfather, Moses Dietrich.

I am having a problem locating information on my great-grandmother's immediate family, the Shearer's. She had approximately 14 brother's and sister's.