--subdivision Collectors and collecting under types of objects, excluding natural objects, for works on collectors and methods of assembling and maintaining collections of objects in a field, e.g. Newspapers--Collectors and collecting; and subdivision Collection and preservation under kinds of natural objects, including plants, animals, and antiquities, for works on methods of collecting and preserving these objects, e.g. Fishes--Collection and preservation
--subdivision Collection and preservation under kinds of natural objects, including plants, animals, and antiquities, for works on methods of collecting and preserving these objects, e.g. Fishes--Collection and preservation; subdivision Conservation and restoration under types of art objects, library materials, types of architecture, etc., for works on preserving and restoring these items, e.g. Newspapers--Conservation and restoration; and subdivision Preservation under perishable products, including types of foods, drugs, textiles, etc., e.g. Corn--Preservation
