History 328 Photography, Artistic 288 Portrait photography 150 Street photography 146 Documentary photography 115 Water-supply 102 Pollution 89 more ... Photography 87 Bridges 82 Photograph collections 82 Canals 75 Water 74 Subways 73 Social life and customs 69 Environmental aspects 68 Design and construction 59 Pictorial works 52 Exhibitions 50 Water quality 43 Architectural photography 42 Planning 42 Social conditions 37 Freshwater invertebrates 35 Ponts 34 Photographers 33 Photojournalism 33 Water resources development 33 African Americans 32 Water quality management 31 Buildings, structures, etc 30 less ...