2011-03-252011-03-254-9-99 17:1999https://hdl.handle.net/1911/58697The origin of the image is Domestic. Watermark Unknown.DrawingDomesticConserve Water,conservewatera99bconservewatera99b开发圣果沙棘，绿化黄土高原；水利部沙棘开发管理中心； [Conserve Water]EnvironmentPublic Service AdsConserve Waternewspapers [报纸]