"Indígenas de América del Sur Perú Antigüedades." . . "Englisch." . . "Fachliteratur." . . "Readers." . . "Readers Juvenile literature." . . "Leseverstehen." . . "Peru" . . "Machu Picchu Site (Peru) Juvenile literature." . . "Reading (Elementary)" . . "English language Textbooks for foreign speakers." . . "Machu Picchu" . . "Machu Picchu." . "Reading materials." . . "English as a second language." . . "Fremdsprachenlektüre." . . "English language." . . "Machu Picchu Site (Peru)" . . "Inglés Libros de lectura." . . "National Geographic (U.S.)" . . "Englischunterricht." . . "Inglés (Lengua) Estudio y enseñanza Discos ópticos." . . . . "Machu Picchu, Sitio arqueológico de (Peru)" . . "Englisch." . . "Reading." . . . . . . . . . . . "The lost city of Machu Picchu" . "The lost city of Machu Picchu"@en . . . . . . . . . . . "Juvenile works"@en . "Juvenile works" . "Introduces the lost city of Machu Picchu and discusses the effect tourism has on the city."@en . "Lehrmittel" . . . . "The lost city of Machu Picchu : [800 headwords, pre-intermediate A2]" . . . . . . "The lost City of Machu Picchu : [pre-intermediate A2]" . . . . . . "History" . . . . . . . . "Textbooks" . "Textbooks"@en . . . . . . . .