TY - BOOK ED - AMERICAN SOCIETY FOR TESTING MATERIALS TI - ASTM STANDARDS: BOOK OF 1961 PART 2: NONFERROUS METALS SPECIFICATIONS, ELECTRON TUBE MATERIALS, SEMICONDUCTORS U1 - 620.0044 PY - 1961/// CY - Estados Unidos PB - AMERICAN SOCIETY FOR TESTING AND MATERIALS KW - METALES NO FERROSOS KW - NORMAS ASTM KW - SEMICONDUCTORES ER -