Ruttner, Franz. "PREFACE". Fundamentals of Limnology, edited by D.G. Frey and F.E.J. Fry, Toronto: University of Toronto Press, 1953, pp. V-v. https://doi.org/10.3138/9781487573782-001
Ruttner, F. (1953). PREFACE. In D. Frey & F. Fry (Ed.), Fundamentals of Limnology (pp. V-v). Toronto: University of Toronto Press. https://doi.org/10.3138/9781487573782-001
Ruttner, F. 1953. PREFACE. In: Frey, D. and Fry, F. ed. Fundamentals of Limnology. Toronto: University of Toronto Press, pp. V-v. https://doi.org/10.3138/9781487573782-001
Ruttner, Franz. "PREFACE" In Fundamentals of Limnology edited by D.G. Frey and F.E.J. Fry, V-v. Toronto: University of Toronto Press, 1953. https://doi.org/10.3138/9781487573782-001