Day care services ... - Washington, U.S. Govt. Print. Off., 1964. - 44 p. illus. 16 x 23 cm. - Its Publication no. 420 . - United States. Children's Bureau. Publication no. 420. . LCCN: hew65000085 Subjects--Topical Terms: Day care centers. LC Class. No.: HV854 / .A466