From the front flap:
"This new handbook makes available in one convenient source nearly 900 unpublished tests and measures of child development - measures of intellectual functioning, personality, self-concept, motor skills, physical attributes, and many other characteristics. Handbook II is designed to be used in conjunction with the 300 measures contained in the first handbook, thereby providing a comprehensive collection of valuable unpublished instruments. . .
This handbook is an extension, supplementary and not overlapping of Handbook I, which covers the literature from 1956 through 1965. Although Handbook II covers almost the same number of years, 1966 to 1974, it contains almost three times as many measures. . ."