An Experimental Investigation of High Amplitude Panel Flutter / H.P. Kappus, C.E. Lemley, and N.H. Zimmerman.H. P. Kappus1971EN
Families of Altenheim, ancestry, and memorial, Katherina Hansel. Prepared and published by Louis Ansel Duermyer. Genealogical research by Hannah Kappus-Mulsow ...Louis Ansel Duermyer1962EN