Kennedy, W K .
Human and animal powered water-lifting devices: A state of the out survey / Textual Documents W K Kennedy. - Intermediate technology publications , 1985. - 111 ; .
621.64 / KEN/HU
Human and animal powered water-lifting devices: A state of the out survey / Textual Documents W K Kennedy. - Intermediate technology publications , 1985. - 111 ; .
621.64 / KEN/HU