TY - BOOK AU - Vasilenki, A.A. TI - Investegation of topping units of beet harvesters which top on the root U1 - 631.35 V31I PY - 1963/// CY - Bedford, U.K. PB - National Institute of Agricultural Engineering KW - HARVESTING MACHINERY KW - BEETS AND BEET SUGER -- HARVESTING ER -