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6.1. Personnel. — The preparation, triangulation, and adjustment of Block 
Massif Central were undertaken by the following persons: 
Dr. H. M. Karara, Director of Center of Work. 
Mr. G. Gracie, Research Associate and a Ph. D. canditate. 
Mr. A. A. Elassal, Research Assistant and a Ph. D. candidate. 
Mr. R. K. Brewer, Research Assistant and an M. S. candidate. 
Mr. G. R. Anderson, Research Assistant and a B. S. candidate. 
6.2. Plans for the Future. — To avoid the weaknesses caused by the film diapos 
itives, we are planning to retriangulate the whole block Massif Central using glass 
diapositives. A report on this new test will be published by the University of Illinois 
as soon as possible. 
In addition to the above detailed triangulation on the Wild A7, the University 
of Illinois has also undertaken an analytical triangulation of a part of the block Massif 
Central. We plan to complete this analytical triangulation. A report on this test 
will be published by the University of Illinois. 
BIBLIOGRAPHY 
[1] Karara, H. M., Fehlerfortpflanzung und Ausgleichung von Aerotriangulationsstreifen mit gemessenen 
Querstrecken, Dissertation ETH, Zurich, 1956. 
[2] Zarzycki, J. M., Graphische Interpolationsausgleichung eines Doppelstreifens, Schweizerische Zeitschrift 
für Vermessung und Kulturtechnik, 1949, No. 7. 
[3] Zeller, M., Die Bestimmung von Punktnetzen mittels Lufttriangulation und deren Ausgleichung, Schwei 
zerische Zeitschrift für Vermessung und Kulturtechnik, 1950, No. 10.