TY - BOOK AU - Zweig, Gunter, ed. AU - Sherma, Joseph ed. TI - Analytical methods for pesticides and plant growth regulators SN - 0-12-784310-8 U1 - 632.95 21st ed. PY - 1978/// CY - New York : PB - Academic Press , N1 - Content: v.10: New and updated methods ER -