"Science." . . . . . . . . . . . . . "Class Q combined schedule through 1990"@en . . . "Class Q, science"@en . "Super Library of Congress classification schedules"@en . . . "Class Q, science : Library of Congress classification schedules combined with additions and changes through 1990"@en . "Library of Congress classification schedules combined with additions and changes through 1990"@en . . . "Super LCCS : Gale's Library of Congress classification schedules combined with additions and changes through 1993. Class Q, science"@en . . . "Book Classification Tables." . . "Classification Livres Sciences." . . . .