Lua APA (7ú heag.)
Raykov, A. Operation and design of claw vacuum pumps: Monograph.
Lua i Stíl Chicago (17ú heag.)Raykov, A. Operation and Design of Claw Vacuum Pumps: Monograph.
Lua MLA (8ú heag.)Raykov, A. Operation and Design of Claw Vacuum Pumps: Monograph.
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