Ansis Zariņš,                                                                    Augusts Rubans,                                                                    Gunārs Silabriedis                                                            
                                                
                        Abstract  1155 |
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                                                                                                                                        | DOI 
                            
                                https://doi.org/10.3846/gac.2018.876
                            
                                                                            
                                
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