A proposal to charge Los Angeles residents a $39 yearly parcel tax to help fund the city's libraries moved a step closer today to being placed on the November ballot. The Parks, Health and Aging Committee approved the proposal endorsed by the Board of Library Commissioners, and forwarded it to the full council. City Librarian Martin Gomez said recent budget cuts and layoffs slashed his staff from 1,100 to 800 employees. As a result, starting July 6, virtually all the city's libraries will operate only five days a week instead of the usual six. One of the few exceptions is the downtown Central Library.