An action of UPA on January, 12, 1945 in district center of Gorodnitsia of Zhitomir area (historiography and spring aspect) by I. Kovalchuk

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Formation and some aspects of Zhytomyr City by the OUN(M) in the second half of 1941 by I. Kovalchuk

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Inclusive reactions of stripping and fragmentation involving light cluster nuclei at intermediate energies by V. I. Kovalchuk

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Inclusive reaction of deuteron fragmentation upon its collision with a target deuteron by V. I. Kovalchuk

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Research of Western European old printing books at V. I. Vernad¬skyi National Library of Ukraine by H. I. Kovalchuk

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Stepan Yosypovych Petrov – the head of Rare and Valuable Books Department of the State Public Library of Ukrainian SSR (1949–1961) by H. I. Kovalchuk

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The Preservation and Study of the Sacral Art Fund of Volyn Local History Museum in the First Half of 1990's by Ye. I. Kovalchuk

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The research of the history of book culture in Ukraine by H. I. Kovalchuk

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"Kyiv" letters to I. P. Krypiakevych (the autumn of 1947) by H. I. Kovalchuk

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Attribution and expertise as focus areas in libraries with retrospective rare and valuable editions by H. I. Kovalchuk

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Quasielastic scattering of 6He, 7Be, 8B nuclei from 12C nuclei by V. I. Kovalchuk

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Copies of T. Shevchenko's lifetime editions in department of old and rare booksat V. I. Vernadsky National library of Ukraine by G. I. Kovalchuk

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Diffractive inelastic scattering of 6Li nuclei by 12C, 28Si nuclei by V. I. Kovalchuk

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Effects of donor hydrogen sulfide NaHS on heart rate variability in experimental animals by I. Kovalchuk, M. Hzhehotskyi

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Formation of ecological and economical mechanism of rational use and protection of reclaimed land in a drainage zone by N. Lishchuk, I. Kovalchuk

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Transformation processes in the river-basin system of Bystrytsia and their geoinformation-cartographic models by A. Kovalchuk, I. Kovalchuk, T. Pavlovska

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How to interpret terms "earnings" and "acuests" in the legal relations of penalty of alimonies by I. V. Atamanchuk, Yu. I. Kovalchuk

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Separate aspects of unification of judicial right for Ukraine as factor of harmonization of national right are in the conditions of integration in the European legal relationships by I. V. Atamanchuk, Yu. I. Kovalchuk

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Mathematical modeling for improvement of crisis monitoring evaluation surface water quality by P. I. Kovalchuk, A. V. Herus

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Mathematical modeling of river pollution processes under leaching from reservoirs by P. I. Kovalchuk, O. S. Demchuk, Yu. Kovalenko

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