1 Table of Contents: “...1 Sources of PGE emissions -- 1.1 The automobile catalyst as an important source of PGE...”

2 Table of Contents: “... of Automobile Exhaust and Lead on the Oxygen Exchange of Two Lichens Measured by a New Oxygen Electrode Method...”

3 Table of Contents: “... of automobil exhaust within a forest -- Determination of the gaseous air pollutant uptake of a spruce branch...”

4 “..., combine to create a health­ threatening conflagration on the West Coast. An automobile company interprets...”