Heinz Weihrich, Harold Koontz Heinz Weihrich, Harold Koontz Heinz Weihrich, Mark V. Cannice, Harold Koontz Heinz Weihrich, Mark V. Cannice, Harold Koontz Heinz Weihrich, KoontzHarold Heinz Weihrich ... [等 Gingrich, Harold W.