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Tsalev, M. 1964, New scale insects noted on plants in greenhouses. Rastitelna Zashchita
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Keywords: Greenhouse
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Tsalev, M. 1974, Biological control of the San Jose scale. Priroda, Bulgaria
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Tsalev, M.; Vülcheva, M. 1965, The plum oyster scale. Rastitelna Zashchita
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