Vol. 35 No. 2 (2023)

Original Article

• The effect of spark exercise program on gross and fine motor skills of 6-8 year old boys with mental retardation

  Mir Hamid Salehian, Maghsoud Dehghani, Roya Hosseinzadeh Peyghan, Parinaz Ghanati

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• Results and scientific significance of the Sibiryakov’s (Yakut region) expedition (1894 -1896)

  Elena S. Rufova

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• The Reliability and Validity of the Vietnamese translation of Same-Sex Marriage Scale

  Minh Tien Le

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• Daily doses of COVID-19 vaccine administered in the world

  Jorge Enrique Díaz-Pinzón

  6-11

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• Revision of Bryconamericus (Characiformes, Characidae) from Pacific coastal and Amazon River drainages with descriptions of three new species Revision of Bryconamericus characid fish

  Cesar Román-Valencia, Raquel I. Ruiz - C. , Donald C. Taphorn

  12-56

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