Then and Now

by Heather Amery

Published 4 October 1985
-- Pictures and complementary text explain two fundamental principles of time -- Illustrated in full color

Summer and Winter

by Heather Amery and Peter Firmin

Published 4 October 1985

Day and Night

by Heather Amery and Peter Firmin

Published 4 October 1985
-- Pictures and complementary text explain two fundamental principles of time -- Illustrated in full color