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research Sec. 619. Section 644 of the Education of the Handicapped Act is amended to read as follows: “authorization of appropriations “Sec. 644. For the purpose of carrying out this part, there are authorized to be appropriated $15,000,000 for the fiscal year ending June 30, 1975, $20,000,000 for each of the fiscal years ending June 30, 1976, and June 30, 1977.”