4 
Haseman, Mary G. — On Knots, with a Census of the Amphicheirals with 
Twelve Crossings. 
Trans. Roy. Soe. Edin., vol. lii, 1918, pp. 235-255. 
Knots, On, with a Census of the Amphicheirals with Twelve Crossings. 
Maky Gertrude Haseman. 
Trans. Roy. Soc. Edin., vol. lii, 1918, pp. 235-255. 
Amphicheirals with Twelve Crossings, On Knots, with a Census of the. 
Mary Gertrude Haseman. 
Trans. Roy. Soc. Edin., vol. lii, 1918, pp. 2?5-255. 
