document.write('<b>Dallai, R. in Baccetti, B.</b> 1969. The Spermatozoon of Arthropoda. XI. Further Observations on Collembola., Quaderno N. 137, Comparative spermatology, Proceedings of the Ist International Symposium, Rome-Sienna, 1-5 July 1969, p.275-279. ');