TABLE OF CONTENTS 



Page 



I . INTRODUCTION 1 



II . REVIEW OF PRESENT STATUS 1 



III. UPDATE OF GEOGRAPHIC DISTRIBUTION 2 



IV. MONITORING STUDIES 2 



V. TRANSPLANT EXPERIMENTS 9 



VI . STUDY RECOMMENDATIONS 11 



VII. ELEMENT OCCURRENCE PRINT-OUTS AND MAPS 12 



VIII. LITERATURE CITED 50 



