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Books about Ulbo:
The Paradigm That Changed the Work Place: With Contributions of Hans Van Beinum, Fred Emery, Bjoern Gustavsen... by Frans M. van Eijnatten (Aug 1, 1993)
Durch Farmer in the Missouri Valley: the Life and Letters of Ulbo Eringa, 1866-1950 by Brian W. Beltman (1996)
Wiki information Ulbo:
Lamoraal Ulbo de Sitter was a Dutch geologist at Leiden University, where he was the founder of the school of structural geology. De Sitter was known for his research on the geology of the Alps and Pyrenees. His father was the astronomer Willem de...
Ulbo Garvema is a 1917 Dutch silent film directed by Maurits Binger.