malaria on the marsh river — a silent family crosses the flat wetlands by boat while the standing boatman guides them through the unhealthy air - pontine 幅插畫檔、美工圖案、卡通及圖標
engraved illustration of the human cerebrum and cerebellum, circa 1880 - pontine 幅插畫檔、美工圖案、卡通及圖標19世紀風格, 人體神經系統, 雕刻圖像