Published in Transactions of the Royal Society of South Africa, in 1915, in volume 5, issue 1, pages 25-37
Published in Transactions of the Royal Society of South Africa, in 1915, in volume 5, issue 1, pages 39-43
Published in Transactions of the Royal Society of South Africa, in 1915, in volume 5, issue 1, pages 45-51
Published in Transactions of the Royal Society of South Africa, in 1915, in volume 5, issue 1, pages 61-63
Published in Transactions of the Royal Society of South Africa, in 1915, in volume 5, issue 1, pages 65-194
Published in Transactions of the Royal Society of South Africa, in 1915, in volume 5, issue 1, pages 225-236
Published in Transactions of the Royal Society of South Africa, in 1915, in volume 5, issue 1, pages 237-245
Published in Transactions of the Royal Society of South Africa, in 1915, in volume 5, issue 1, pages 247-258
Published in Transactions of the Royal Society of South Africa, in 1915, in volume 5, issue 1, pages 273-523
Published in Transactions of the Royal Society of South Africa, in 1915, in volume 5, issue 1, pages 524-564
Published in Transactions of the Royal Society of South Africa, in 1915, in volume 5, issue 1, pages 565-570
Published in Transactions of the Royal Society of South Africa, in 1915, in volume 5, issue 1, pages 575-591
Published in Transactions of the Royal Society of South Africa, in 1915, in volume 5, issue 1, pages 593-598
Published in Transactions of the Royal Society of South Africa, in 1915, in volume 5, issue 1, pages 599-602
Published in Transactions of the Royal Society of South Africa, in 1915, in volume 5, issue 1, pages 603-604
Published in Transactions of the Royal Society of South Africa, in 1915, in volume 5, issue 1, pages 605-636
Published in Transactions of the Royal Society of South Africa, in 1915, in volume 5, issue 1, pages 637-646
Published in Transactions of the Royal Society of South Africa, in 1915, in volume 5, issue 1, pages 653-657
Published in Transactions of the Royal Society of South Africa, in 1915, in volume 5, issue 1, pages 669-670
Published in Transactions of the Royal Society of South Africa, in 1915, in volume 5, issue 1, pages 685-694
Published in Transactions of the Royal Society of South Africa, in 1915, in volume 5, issue 1, pages 695-701
Published in Transactions of the Royal Society of South Africa, in 1915, in volume 5, issue 1, pages 713-750