Grüger, E. (1972). Pollen and macrofossils profiles and age determination from the Pittsburg Basin in the lowlands of south-central Illinois. PANGAEA.
Chicago-Zitierstil (17. Ausg.)Grüger, Eberhard. Pollen and Macrofossils Profiles and Age Determination from the Pittsburg Basin in the Lowlands of South-central Illinois. PANGAEA, 1972.
MLA-Zitierstil (9. Ausg.)Grüger, Eberhard. Pollen and Macrofossils Profiles and Age Determination from the Pittsburg Basin in the Lowlands of South-central Illinois. PANGAEA, 1972.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.