"Isotopes of oxygen#Oxygen-28" . "oxygen isotopes" . "Isotopes of oxygen#Oxygen-22" . "Isotopes of oxygen#Oxygen-13" . "oxygen" . "Isotopic oxygen" . "oxygen isotopic" . "Isotopes of oxygen#Oxygen-23" . "Isotopes of oxygen#Oxygen-14" . "²⁰O" . "Oxygen Isotope" . "¹⁸O/¹⁶O" . "\\\"heavy\\\" oxygen" . "oxygen isotopic signature" . "Isotopes of oxygen#Oxygen-24" . "Isotopes of oxygen#Oxygen-15" . "3" . . "Oxygen isotope" . "oxygen-15" . "stable oxygen isotopes" . . "Isotopes of oxygen#Oxygen-25" . "3 of oxygen" . "Isotopes of oxygen#Oxygen-19" . "isotopes of oxygen" . "Isotopes of oxygen" . "oxygen isotope" . "oxygen-19" . . "Isotopes of oxygen" . "¹⁴O" . "Isotopes of oxygen#Oxygen-26" . "Isotopes of oxygen#Oxygen-20" . "Isotopes of oxygen#Oxygen-11" . "oxygen-16" . "oxygen-isotopic composition" . "O" . "¹⁵O" . "Isotopes of oxygen#Oxygen-27" . "Isotopes of oxygen#Oxygen-21" . "Isotopes of oxygen#Oxygen-12" . "isotope of oxygen" . . .