THE LIBRARY RECORDS OF A MIDWESTERN PUBLIC LIBRARY WERE EXAMINED TO DETERMINE WHICH AGE GROUPS VISIT THE PUBLIC LIBRARY DURING THE SUMMER, WHICH AGE GROUP READS THE GREATEST NUMBER OF BOOKS, AND HOW MANY OF THE VOLUMES CIRCULATED ARE LISTED IN THE "CHILDREN'S CATALOG" AS QUALITY LITERATURE. DATA COMPILED WITHIN A 6-DAY PERIOD REVEALED THAT--(1) MORE ELEMENTARY SCHOOL CHILDREN THAN ADULTS VISITED THE PUBLIC LIBRARY DURING THE SUMMER, (2) THE CHILDREN PATRONS FELL WITHIN THE AGE RANGE OF 5 TO 16, WHILE BOYS WERE INTERESTED IN THE LIBRARY AT THE AGE OF 7 TO 9 AND GIRLS AT THE AGE OF 7 TO 12, (3) AS A MIXED GROUP, THE 8-YEAR-OLDS CHECKED OUT THE GREATEST NUMBER OF BOOKS LISTED IN THE "CHILDREN'S CATALOG," AND (4) 21 PERCENT OF 1,421 VOLUMES CIRCULATED WERE LISTED AS QUALITY LITERATURE IN THE "CHILDREN'S CATALOG." SEVERAL PROBLEMS NEEDING FURTHER RESEARCH ARE SUGGESTED, AND A BIBLIOGRAPHY IS INCLUDED. (NS)