About Ruth Hay Books by Ruth Hay Patterns in Human Geography, Unit 1 by (author) Jennette MacKenzie, Susan Green & Ruth Hay Reading Geography, Grade 8 by (author) Jennette MacKenzie, Susan Green & Ruth Hay Economic Systems, Unit 2 by (author) Jennette MacKenzie, Susan Green & Ruth Hay Teacher's Guide Reading Geography, Grade 8 by (author) Jennette MacKenzie, Susan Green & Ruth Hay Migration, Unit 3 by (author) Jennette MacKenzie, Susan Green & Ruth Hay