Ralph M. Feather Jr., PhD, Assistant Professor Geoscience Department ... & Susan Leach Snyder, Retired Teacher, Consultant Jones Middle ... & Dinah Zike, Educational Consultant Dinah-Might Activities, Inc., ... (...)

Lithology (1)

T.G. Blenkinsop & M.G. Doyle

Tectonics (1)

Bob Booth & Scott Crosier & Andrew Perencsik & Simon Woo (...)

Страноведение (1)

Paul R. Wood & Kurt Gerber & Jeroen Peters & Sulaiman Al-Shaqsi (...)

Историческая география (1)