Columbia subject headings:
Convict labor--Michigan--Jackson.
Prison contraband--Michigan--Jackson.
Prisoners--Michigan--Jackson.
State Prison of Southern Michigan.
Harvard subject headings:
Convict labor--Michigan--Jackson.
Prison contraband--Michigan--Jackson.
Prisoners--Michigan--Jackson.
State Prison of Southern Michigan.
Princeton subject headings:
Convict labor--Michigan--Jackson.
Prison contraband--Michigan--Jackson.
Prisoners--Michigan--Jackson.
State Prison of Southern Michigan.