Complex sentence: Publications in the new science of organology were undertaken by Hnat Khotkevych with his 1930 monograph "Musical instruments of the Ukrainian people" was banned by the Soviet authorities in 1934 because of it studied the phenomena of folk instruments from a national perspective.
Split into simpler sentences: Publications in the new science of organology were undertaken by Hnat Khotkevych with his 1930 monograph "Musical instruments of the Ukrainian people". It was banned by the Soviet authorities in 1934 because it studied the phenomena of folk instruments from a national perspective.