na INLIS000000000009791 20240223092405 0010-0521009791 240223 | | en 543.06/OFF3 543.06/OFF3 Kenneth Helrich OFFICIAL methods of analysis association of official analytical chemists.- 15th edition / Kenneth Helrich 15th.- Arlington : Association of Official Analytical Chemists, 1990 xvii, p. 685-1298: ill.; 29 cm. FOODS -- CHEMISTRY -- CHEMICAL ANALYSIS 264/BPV/93