Civil Engineering Association

Dear members,

can someone help me get this article:

A Method of Computation for Structural Dynamics
by Nathan M. Newmark, F.ASCE, (Head, Dept. of Civ. Engrg., Univ. of Illinois, Urbana, IL)
Journal of the Engineering Mechanics Division, Vol. 85, No. 3, July 1959, pp. 67-94

It says it is available here:

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but I'm unable to download it.

Also, I found it here:

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but I can't see here the Buy nor Download icon

Many thanks in advance!

Here it is:

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Grunf

ynopum