1. Principles of palaeoecology: An introduction to the study of how and where animals and plants lived in the past;Ager,1963
2. The adaptation of Mesozoic brachiopods to different environments;Ager;Palaeogeography, Palaeoclimatology, Palaeoecology,1965
3. Mesozoic and cenozoic rhynchonellacea;Ager,1965
4. Brachiopod palaeoecology;Ager;Earth-Science Reviews,1967
5. Alleged sexual dimorphism in Mesozoic brachiopods, pp. 34–36;Ager,1969