00527nam#a2200157#i#450# EN\ACADEMUS PUBLISHING\book\2212 20240427014218.6 20210730d2021####ek#y0engy0150####ca ENG RU FLOTATION MULTISTAGE AND GENERALIZED MODELS OF THE PROCESS HARVESTERS OF KSENOFONTOV TYPE AND FOR SPECIAL PURPOSE Monography San Francisco Academus Publishing 2021 299 с. Monography local Ksenofontov Boris Semenovich academuspub.com