Volume II contains the substance of five studies originally filed with the United States District Court for the District of Arizona in the cases of "Fisher v. Lohr" and "Mendoza v. Tucson School District No. 1." Study VI examines the migration of Spanish-surnamed households from Tucson's south and west sides to the east side from 1946-1965, and their subsequent residence to 1975. In Study VIII, the differential dispersion of Spanish-surnamed households into Tucson's east side from the west and south sides in the mid-1950's is investigated. Study VIII explores the recent immigration of alien Mexicans as a significant factor in the impaction of Spanish-surnamed people in certain parts of Tucson during 1976. The "Platoon System" (1923-1942), an effort at special programming to meet language needs beyond the 1-C grade, is discussed in Study IX, which was undertaken as a companion to two other studies to increase understanding of the problems of programming for language differences in the 1920's and 1930's and to clarify the solutions sought in those decades. Begun after the trial commenced on January 11, 1977, the last study examines the Menlo Park School ethnicity patterns from 1918 to 1946. (NQA)