In 1959—roughly a decade after vinyl LPs first became widely available to consumers—the Library of Congress published "Preservation of Sound Recordings" (A.G. Pickett and M.M. Lemcoe), the first and most extensive investigation of the deterioration of grooved discs and magnetic tape. Funded by a grant from the Rockefeller Foundation, the purpose of the investigation was to establish suitable guidelines for the storage and preservation of sound recordings for libraries. Conducted at the Southwest Research Institute of San Antonio, the study involved subjecting sound recordings to a series of lab tests, from accelerated aging to fungal exposure. Though considered the definitive study in the field, the chemical makeup of plastics and how they perform under stress was the primary focus of the report, whereas playback deterioration—a significant concern to sound archivists and record collectors—was excluded from the investigation.