Handbook of snakes of the United States and Canada /

Eitemau Tebyg

• Handbook of frogs and toads : the frogs and toads of the United States and Canada /
  gan: Wright, Anna Allen,, et al.
  Cyhoeddwyd: (1942.)
• Field book of snakes of the United States and Canada /
  gan: Schmidt, Karl Patterson,, et al.
  Cyhoeddwyd: (c1941)
• Turtles of the United States & Canada /
  gan: Pope, Clifford Hillhouse,
  Cyhoeddwyd: (1971.)
• Weeds of the northern United States and Canada /
  gan: Montgomery, F. H.
  Cyhoeddwyd: (1964.)
• Handbook of scientific and technical societies and institutions of the United States and Canada /
  gan: Hull, Callie., et al.
  Cyhoeddwyd: (1942.)