From the Lawrence Daily Journal-World for July 20, 1986:

A mold growing from a spore called cladosporium was causing a lot of worry at Kansas University’s Watson Library. The destructive mold, which had been noticed on books in March, was now present in the building’s air-conditioning system. “We’re all chewing our nails over here,” said circulation supervisor Kendall Simmons. “This is the most dangerous thing that can happen.” The March infiltration had reached a point of 35 mold-infected books every two weeks, but the growth had been stemmed, library officials thought, after fumigation. However, an employee had recently reported “a gray-green stuff” spreading from the air vents in the library’s center stacks. The mold had the potential to be damaging or even totally destructive to books, spurring fears for the entire collection if the infection spread.