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Showing 1 - 20 of 41 for search: 'Willem de Sitter', query time: 0.04s
Digital Object Unavailable
Date: 1916-11-01
Archival Call Number: 83-131
Document Type: Autograph Letter Signed (ALS)
    Digital object Available
    Date: 1913-02-14
    Archival Call Number: 20-530
    Document Type: Printed Text (REPT)
      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: 20-535
          Document Type: Autograph Letter Signed (ALS)
            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: 1916-07-27
                Archival Call Number: 20-538
                Document Type: Typed Transcript of Letter (TTRL)
                  Digital object Available
                  Date: 1917-03-15
                  Archival Call Number: 20-543
                  Document Type: Autograph Postcard Signed (AKS)
                    Digital object Available
                    Date: 1917-03-15
                    Archival Call Number: 20-544
                    Document Type: Typed Transcript of Postcard (TTRP)
                      Digital object Available
                      Date: 1917-03-20
                      Archival Call Number: 20-545
                      Document Type: Autograph Letter Signed (ALS)
                        Digital object Available
                        Date: 1917-03-24
                        Archival Call Number: 20-549
                        Document Type: Autograph Document, in Photocopy (ADX)
                          Digital object Available
                          Date: 1917-04-01
                          Archival Call Number: 20-551
                          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: 1917-04-18
                              Archival Call Number: 20-554
                              Document Type: Autograph Postcard Signed (AKS)
                                Digital object Available
                                Date: 1917-04-18
                                Archival Call Number: 20-555
                                Document Type: Typed Transcript of Postcard (TTRP)
                                  Digital object Available
                                  Date: 1917-06-20
                                  Archival Call Number: 20-557
                                  Document Type: Autograph Letter Signed (ALS)
                                    Digital object Available
                                    Date: 1917-06-20
                                    Archival Call Number: 20-558
                                    Document Type: Typed Transcript of Letter (TTRL)
                                      Digital object Available
                                      Date: 1917-08-08
                                      Archival Call Number: 20-562.1
                                      Document Type: Autograph Document, in Photocopy (ADX)
                                        Digital object Available
                                        Date: 1917-08-08
                                        Archival Call Number: 20-563
                                        Document Type: Autograph Document, in Photocopy (ADX)

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