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 Urban A. J., Eardley C. D., 1995: A recently introduced sawfly, Nematus oligospilus Förster (Hymenoptera: Tenthredinidae), that defoliates willows in southern Africa. 5 pp. African Entomology 3(1): 23-27.

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 Veisig S. J., 1939: Materialy po gidrobiologii risovych polej. 18 pp. 

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 Walters C. J., Peterman R. M., 1974: A systems approach to the dynamics of spruce budworm in New Brunswick. 10 pp. Quaestiones Entomologicae 10: 177-186.

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 Werminghausen B., 1957: Nährstoffmangelerscheinungen im Obstau und ihre Behebung. Mit 8 farbige Abbildungen. 92 pp.  Discount 20%!

 Wermuth P., 2000: Bioindikation der Gewässerverhältnisse an der Birs (CH, Kanton Basel-Land) mit Hilfe von Emergenzfallen. 3 pp. (in German). Mitt. Dtsch. Ges. Allg. Agnew. Ent. 12: 255-257.

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 Winiarska W., 1986: Roslinozerna entomofauna ostrozenia polnego, Cirsium arvense (L.) Scop. Phytophagous insects found on Cirsium arvense (L.) Scop. 15 pp. (in Polish). Polskie Pismo Entomologiczne 56: 701-715.

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 Yamane T., 2013: Reduction in the attraction of males to females after mating in the rice leaf bug Trigonotylus caelestialium. 6 pp. Entomological Science 16(1): 60-65.

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 Yardeni A., 1987: Evaluation of wind dispersed soft scale crawlers (Homoptera: Coccidae), in the infestation of a citrus grove in Israel. 7 pp. Israel Journal Ent. 21: 25-31.

 Yasamutsu K., 1971: On some biological control problems in Japan. 5 pp. Israel Journal Ent. 6(2): 301-305.

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 Yuyama K., Aguiar J. P. L., Yuyama L. K. O., 2002: Camu-camu fruit, a fantastic source of vitamin C. 5 pp. Acta Amazonica 32(1): 169-173.

 Yuyama L. K. O., Aguiar J. P. L., Yayama K., Lopes T. M., Fávaro D. I. T., Bergl P. C. P., Vasconcellos M. B. A., 2003: Content of mineral elements in some populations of camu-camu. 6 pp. Acta Amazonica 33(4): 549-554.

 Zachariades C., Midgley J. J., 1999: Extrafloral nectaries of South African Proteaceae attract insects but do not reduce herbivory. 10 pp. African Entomology 7(1): 67-76.

 Zaitzev W. F., 1990: Main trends of research towards pest and weed biocontrol in scientific institutions of the USSR Academy of Scinces. 5 pp. Israel Journal Ent. 24: 133-137.

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 Zarei H., Hajizadeh J., Khanjan M., 2015: Prostigmatic mites (Acari: Prostigmata) associated with olive trees in Guilan Province with checklist for prostigmatic mites of olive orchards in Iran. 16 pp. Entomofauna 36: 397-412.

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 Zeren O., Dikmen N., Kumbur H., Taga S., 1998: Içel ilinde tarimsal kesimde çalişan kişilerin plazmalarinda kolinesteraz aktivite degişiminin araştirilmasi. [An investigation of the cholinesterase activity in plasma of workers who working at the agriculture in Içel Province (Turkey). 7 pp. Turkish journal of entomology 22(3): 199-205.