Cite
MLA Citation
Jan Guichelaar. Willem de Sitter : Einstein's friend and opponent. Cham, Switzerland : Springer, 2018. http://access.bl.uk/ark:/81055/vdc_100067416123.0x000001
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Jan Guichelaar. Willem de Sitter : Einstein's friend and opponent. Cham, Switzerland : Springer, 2018. http://access.bl.uk/ark:/81055/vdc_100067416123.0x000001