Akhyar, M., 		Pranoto, S., & 		Malau, M.
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 Performance Analysis of a Horizontal Axis Spiral Type of Solar Collector Made of Copper Pipe on Solar Energy Absorption.
<em>Journal Of Ocean, Mechanical And Aerospace -Science And Engineering-, 69</em>(3), 259-263.
doi:10.36842/jomase.v69i3.565