Books and reading (1) Notebooks (1) Note-taking (1) Marginalia (1) Hydrogen-ion concentration (1) Flight (1) Beards (1) Sociological aspects (1) Toma de apuntes (1) Vuelo (1) Concentración de iones hidrógeno (1) Barba (1) Sociología (1) Libros y lectura (1) Sociologie (1) Gloses (1) Sociologie (1) Livres et lecture (1) Notes en bas de page (1) Cahiers (1) Notes marginales (1) Prise de notes (1) pH (1) Vol (1) Barbe (1) vol (1) New York (1)