Strobe instrument (Germany?) - Frank Früngel, 1956 HEE-SC-03939 Edgerton, Harold Eugene 1958-10 ViewImmanuel Marshak, Frank Früngel, 1962 HEE-SC-03695 Edgerton, Harold Eugene 1962-10 ViewStrobe and camera apparatus display (Germany?) - Frank Früngel, 1958 HEE-SC-02882 Edgerton, Harold Eugene 1958-10 ViewHigh-speed photography congress - Harold E. Edgerton, Frank Früngel, 1970 HEE-SC-07684 Edgerton, Harold Eugene 1970-08- ViewStroboscope experiments - Frank Früngel HEE-SC-09161 Edgerton, Harold Eugene ViewFrank Früngel, 1962 HEE-SC-03691 Edgerton, Harold Eugene 1962-10 View