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Link to website: Jack Christiansen, Leader in Thin Concrete Shells, Dead at 89
Accessed at URL:
Accessed at URL:
https://www.enr.com/articles/42655-jack-christiansen-leader-in-thin-concrete-shells-dead-at-89
Originally accessed:
Originally accessed:
2017-10-24
Organization:
Organization:
Engineering News-Record (ENR).com
Associated with:
Associated With:
John Valdemar Christiansen