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            21Survival of Pseudomonas solanacearum E. F. Smith in the rhizosphere of some weed and economic plant specied [microform]Published 1981Visual Material
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            22
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            25Productivity and returns to inputs of fishpan aquaculture in the Philippines [microform]Published 1981Visual Material
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            26Shifts in weed and weed seed population under different multiple cropping patterns [microform]Published 1981Visual Material
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            27
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            30Mass media habits of rural people in a Philippine municipality [microform].Published 1980Visual Material