TY  - BOOK
AU  - Spigai,Frances G.
ED  - ERIC Clearinghouse on Library and Information Sciences.
TI  - The invisible medium: the state of the art of microform and a guide to the literature 
AV  - Z265 .S73
U1  - 016.6864/3 
PY  - 1973///
CY  - Washington
PB  - ERIC Clearinghouse on Library and Information Sciences
KW  - Microforms
KW  - Microforms -- Bibliography
N1  - Includes bibliobgraphical references
ER  -