. "HUP-2" . . . "HJP Retriever" . . . . "Piasecki HUP-1" . "1954" . . "Piasecki HUP-3 Retriever" . . . "Piasecki HUP Retriever" . . . . . . "HUP Retriever" . . . "HUP-1" . . "Piasecki HUP-2 Retriever" . . . . . . . . . "Piasecki HUP II" . . "H-25" . . "HUP/UH-25C" . . . . . "Piasecki HUP Retriever" . . . "Piasecki PV-18" . "H-25 Army Mule" . . . . . . . . . . "1949" . "HUP-1 Retriever" . "Piasecki HUP-2S Retriever" . "Piasecki's HUP Retriever and H-25 Army Mule" . "HUP" . "339" . "Piasecki HUP Army Mule" . .