Congresses 71
Pictorial works 48
Amateurs' manuals 27
Handbooks, manuals, etc 26
Case studies 13
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Problems, exercises, etc 4
Catalogs 3
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Examinations, questions, etc 1
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Handbooks, manuals, etc 1
Handbooks, manuals, etc 1
Handbooks, manuals,etc 1
Interviews 1
Laboratory manuals 1
Pays-Bas 1
Pictorial works 1
Restaurants 1
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Yearbooks 1