Z. Bedny, SystemsGregory2018-12-312024-07-022018-12-312024-07-022015978-1-4822-5805-9https://drs.ess.gov.et/handle/123456789/32762enHuman–ComputerInteraction SystemsGregoryApplying Systemic-StructuralActivity Theory toDesign of Human–ComputerInteraction SystemsBook