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Ralph R. Leffler
Ralph R. Leffler
Civil engineering
Geotechnical engineering
Engineering
Urban planning
Environmental science
2
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2024
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Discussion of "Express Highway Planning in Metropolitan Areas"
1947
Transactions of the American Society of Civil Engineers
Harry W. Lochner
F. Lavis
Homer M. Hadley
Donald M. Baker
W. J. Van London
Merrill D. Knight
R. H. Baldock
Jacob Feld
Harold M. Lewis
Theodore T. McCrosky
Spencer A. Snook
Lawrence S. Waterbury
Bernard L. Weiner
George H. Herrold
Ralph R. Leffler
M. Hirschthal
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Discussion of A Plan for a Movable Dam by Isaac DeYoung
1946
Transactions of the American Society of Civil Engineers
C L Hall
C. E. Meyerdick
Ralph R. Leffler
Jay L. Southworth
L. C. Sabin
A. W. Sargent
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