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Showing 1 - 20 of 41 for search: 'Willem de Sitter', query time: 0.05s
Digital object Available
Date: 1913-02-14
Archival Call Number: 20-530
Document Type: Printed Text (REPT)
    Digital object Available
    Date: 1916-07-27
    Archival Call Number: 20-535
    Document Type: Autograph Letter Signed (ALS)
      Digital object Available
      Date: 1916-07-27
      Archival Call Number: 20-538
      Document Type: Typed Transcript of Letter (TTRL)
        Digital object Available
        Date: 1917-03-20
        Archival Call Number: 20-545
        Document Type: Autograph Letter Signed (ALS)
          Digital object Available
          Date: 1917-04-01
          Archival Call Number: 20-552
          Document Type: Typed Transcript of Letter (TTRL)
            Digital object Available
            Date: 1917-06-20
            Archival Call Number: 20-557
            Document Type: Autograph Letter Signed (ALS)
              Digital object Available
              Date: 1917-08-08
              Archival Call Number: 20-563
              Document Type: Autograph Document, in Photocopy (ADX)
                Digital object Available
                Date: 1919-12-01
                Archival Call Number: 20-569
                Document Type: Autograph Letter Signed (ALS)
                  Digital object Available
                  Date: 1920-11-04
                  Archival Call Number: 20-572
                  Document Type: Typed Transcript of Letter (TTRL)
                    Digital object Available
                    Date: 1921-09-06
                    Archival Call Number: 20-577
                    Document Type: Autograph Letter Signed (ALS)
                      Digital object Available
                      Date: 1924-12-10
                      Archival Call Number: 20-583
                      Document Type: Typed Transcript of Letter (TTRL)
                        Digital object Available
                        Date: 1933-04-03
                        Archival Call Number: 20-586
                        Document Type: Typed Transcript of Letter (TTRL)
                          Digital Object Unavailable
                          Date: 1918-04-10
                          Archival Call Number: 82-768
                          Document Type: Autograph Letter Signed (ALS)
                            Digital Object Unavailable
                            Date: 1916-06-01
                            Archival Call Number: 87-953
                            Document Type: Autograph Letter Signed (ALS)
                              Digital Object Unavailable
                              Date: 1916-11-01
                              Archival Call Number: 83-131
                              Document Type: Autograph Letter Signed (ALS)
                                Digital object Available
                                Date: 1916-06-22
                                Archival Call Number: 20-532
                                Document Type: Autograph Document, in Photocopy (ADX)
                                  Digital object Available
                                  Date: 1916-06-22
                                  Archival Call Number: 20-533
                                  Document Type: Autograph Document, in Photocopy (ADX)
                                    Digital object Available
                                    Date: 1916-07-27
                                    Archival Call Number: 20-536
                                    Document Type: Typed Transcript of Letter (TTRL)
                                      Digital object Available
                                      Date: 1916-07-27
                                      Archival Call Number: 20-537
                                      Document Type: Autograph Letter Signed (ALS)
                                        Digital object Available
                                        Date: 1917-03-15
                                        Archival Call Number: 20-543
                                        Document Type: Autograph Postcard Signed (AKS)

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