Hour glasses

MLA

Sternfeld, Joseph. and National Association of Watch and Clock Collectors. Hour glasses. [Williamstown?, MA] : National Association of Watch and Clock Collectors, 1953.

APA

Sternfeld, J. & National Association of Watch and Clock Collectors. (1953). Hour glasses. [Williamstown?, MA] : National Association of Watch and Clock Collectors.

Chicago

Sternfeld, Joseph. and National Association of Watch and Clock Collectors. Hour glasses. [Williamstown?, MA] : National Association of Watch and Clock Collectors, 1953.