The forms of the common Old World swallowtail butterfly (Papiliomachaon) in North America, with descriptions of two new subspecies
Published in Proceedings of The United States National Museum, in 1932, in volume 81, pages 1-15
Date published:1932
Published in Proceedings of The United States National Museum, in 1932, in volume 81, pages 1-15
Date published:1932