In this task, you're given passages that contain mentions of names of people, places, or things. Some of these mentions refer to the same person, place, or thing. Your job is to write questions that evaluate one's understanding of such references. Good questions are expected to link pronouns (she, her, him, his, their, etc.) or other mentions to people, places, or things to which they may refer. Do not ask questions that can be answered correctly without understanding the paragraph or having multiple answers. Avoid questions that do not link phrases referring to the same entity. For each of your questions, the answer should be one or more phrases in the paragraph, and it should be unambiguous.

Passage: Most of Glicken's published work centers around the 1980 eruption of Mount St. Helens. He also coauthored works with other volcanologists that focused on debris avalanches. Colleague Jon Major writes that "The full scope of Harry's work ... has never been published."
"The 1980 eruptions of Mount St. Helens, Washington. USGS Professional Paper No. 1250". United States Geological Survey. 1981: pgs. 347–377.
Meyer, William; Sabol, M.A; Glicken, H.X; Voight, Barry (1981). "The effects of ground water, slope stability, and seismic hazards on the stability of the South Fork Castle Creek blockage in the Mount St. Helens area, Washington. USGS Professional Paper No. 1345". United States Geological Survey.
"The effects of ground water, slope stability, and seismic hazard on the stability of the South Fork Castle Creek blockage in the Mount St. Helens area, Washington. USGS Open File No. 84–624". United States Geological Survey. 1984.
Glicken, Harry X.; Meyer, William; Sabol, Martha A. (1989). "Geology and ground-water hydrology of Spirit Lake blockage, Mount St. Helens, Washington, with implications for lake retention. USGS Bulletin No. 1789". United States Geological Survey.
Glicken, Harry (1996). "Rockslide-debris avalanche of May 18, 1980, Mount St. Helens Volcano, Washington. USGS Open File No. 96-677". United States Geological Survey: 98.
What was the first name of the man who wrote a paper about the rockside-debris avalanche of May 18, 1980?