1
Опубликовано: [1942]
Superior document: Title is part of eBook package: De Gruyter CUP eBook Package Archive 1898-1999 (pre Pub)
2
Опубликовано: [2011]
Superior document: Title is part of eBook package: De Gruyter DGBA Library Information Science <1990
Links: Полный текст; Полный текст; Cover