| Value | 
                    Category | 
                                                                            
                                    
                    
                        | ADOPTED FROM OUTSIDE SUPPLIES | 
                          | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | COMPETENT STAFF | 
                          | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | INTERNENT | 
                          | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | MAGAZINES | 
                          | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | OVERSEAS MAGAZINES | 
                          | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | READING TRADE JOURNALS | 
                          | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | RESEARCH AND DEVELOPMENT | 
                          | 
                        
                            
                        
                        
                        
                        
                            
                    
                            
            Warning: these figures indicate the number of cases found in the data file. They cannot be interpreted as summary statistics of the population of interest.