Press and Siever - Earth - Index pages

Press and Siever - p448

Press and Siever - Earth P413 onwards

Press and Siever - Earth - Cover and Contents Pages

Cailleux Anatomy of the Earth

Aspen Guide to Electrolytes

From Aristotle Physics Book II Chapter 8

Cross Section Canada and USA G95A_Hammer_Insert_HighRes

Press and Siever - Cross Section of the USA p488

Press and Siever - Earth Cover and Contents

Protecting Membranes Boosts Benefits

extract from press and siever including some from index

Cailleux Figure 8 and 9

Cailleax Anatomy of the earth page 220 page 221

sura 31-10