TECHNICAL COMMISSIONS AND WORKING GROUPS 
7 
W.G. 4. interpretation of Vegetation 
Chairman: D. A. Boon 
W.C. 5. Interpretation of Urban, Rural 
and Industrial Structures 
Chairman: N. E. Green 
W.G. 6. Interpretation of Ice 
Chairman: R. Thoren 
W.G. 4. Vegetation 
President: D. A. Boon 
W.G. 5. Regional Geography and 
Planning 
President: S. Schneider 
W.G. 6. Ice 
President: R. E. Frost 
W.G. 7. Archaeology 
President: J. K. S. St. Joseph 
W.G. 8. Oceanography and Coastal 
Research 
President: F. Ruellan 
W.G. 9. Engineering 
President: E. D. Miles