Arthur Holmes (September 22, 1928). "Theory of Continental Drift: a Symposium on the Origin and Movement of Land Masses, both Inter-Continental and Intra-Continental, as proposed by Alfred Wegener". Nature. 122 (3073): 431–433. Bibcode:1928Natur.122..431H. doi:10.1038/122431a0. S2CID4138562.
Arthur Holmes (September 22, 1928). "Theory of Continental Drift: a Symposium on the Origin and Movement of Land Masses, both Inter-Continental and Intra-Continental, as proposed by Alfred Wegener". Nature. 122 (3073): 431–433. Bibcode:1928Natur.122..431H. doi:10.1038/122431a0. S2CID4138562.
Arthur Holmes (September 22, 1928). "Theory of Continental Drift: a Symposium on the Origin and Movement of Land Masses, both Inter-Continental and Intra-Continental, as proposed by Alfred Wegener". Nature. 122 (3073): 431–433. Bibcode:1928Natur.122..431H. doi:10.1038/122431a0. S2CID4138562.