Published in Transactions of the Royal Society of South Africa, in 1913, in volume 3, issue 1, pages 23-32
Published in Transactions of the Royal Society of South Africa, in 1913, in volume 3, issue 1, pages 35-38
Published in Transactions of the Royal Society of South Africa, in 1913, in volume 3, issue 1, pages 39-40
Published in Transactions of the Royal Society of South Africa, in 1913, in volume 3, issue 1, pages 41-46
Published in Transactions of the Royal Society of South Africa, in 1913, in volume 3, issue 1, pages 47-60
Published in Transactions of the Royal Society of South Africa, in 1913, in volume 3, issue 1, pages 61-106
Published in Transactions of the Royal Society of South Africa, in 1913, in volume 3, issue 1, pages 113-120
Published in Transactions of the Royal Society of South Africa, in 1913, in volume 3, issue 1, pages 121-128
Published in Transactions of the Royal Society of South Africa, in 1913, in volume 3, issue 1, pages 139-146
Published in Transactions of the Royal Society of South Africa, in 1913, in volume 3, issue 1, pages 177-185
Published in Transactions of the Royal Society of South Africa, in 1913, in volume 3, issue 1, pages 187-194
Published in Transactions of the Royal Society of South Africa, in 1913, in volume 3, issue 1, pages 195-197
Published in Transactions of the Royal Society of South Africa, in 1913, in volume 3, issue 1, pages 205-229
Published in Transactions of the Royal Society of South Africa, in 1913, in volume 3, issue 1, pages 249-254
Published in Transactions of the Royal Society of South Africa, in 1913, in volume 3, issue 1, pages 255-257
Published in Transactions of the Royal Society of South Africa, in 1913, in volume 3, issue 1, pages 259-270
Published in Transactions of the Royal Society of South Africa, in 1913, in volume 3, issue 1, pages 275-335
Published in Transactions of the Royal Society of South Africa, in 1913, in volume 3, issue 1, pages 337-339
Published in Transactions of the Royal Society of South Africa, in 1913, in volume 3, issue 1, pages 357-363
Published in Transactions of the Royal Society of South Africa, in 1913, in volume 3, issue 1, pages 365-378
Published in Transactions of the Royal Society of South Africa, in 1913, in volume 3, issue 1, pages 379-391
Published in Transactions of the Royal Society of South Africa, in 1913, in volume 3, issue 1, pages 393-397
Published in Transactions of the Royal Society of South Africa, in 1913, in volume 3, issue 1, pages 399-402