1
Cyhoeddwyd: [2022]
Superior document: Title is part of eBook package: De Gruyter DGBA Business and Economics <1990
2
Cyhoeddwyd: [2022]
Superior document: Title is part of eBook package: De Gruyter DGBA Social Sciences - <1990
3
Cyhoeddwyd: 1978
Superior document: Forschungsberichte des Zentralinstituts für Wirtschaftswissenschaften der Akademie der Wissenschaften der DDR 26
4
Cyhoeddwyd: [2022]
Superior document: Title is part of eBook package: De Gruyter DGBA Mathematics - <1990
Links: Cael y testun llawn; Cael y testun llawn; Cover
5
Cyhoeddwyd: [2022]
Superior document: Title is part of eBook package: De Gruyter DGBA Business and Economics <1990
Links: Cael y testun llawn; Cael y testun llawn; Cover
6
Cyhoeddwyd: [2022]
Superior document: Title is part of eBook package: De Gruyter DGBA Social Sciences - <1990
Links: Cael y testun llawn; Cael y testun llawn; Cover
7
Cyhoeddwyd: [2022]
Superior document: Title is part of eBook package: De Gruyter DGBA Social Sciences - <1990
Links: Cael y testun llawn; Cael y testun llawn; Cover