Naturvidenskabelige Skrifter. Samlet Udgave med to Afhandlinger om hans Virke ved Kirstine Meyer./ Scientific Papers. Collected Edition with two Essays on his Work by Kirstine Meyer. 3 vols.
Copenhagen, Thieles, 1920.
4to. Uniformly bound in three recent blue full cloth bindings. A nice and clean set. CLXVI,344, (4) pp.; 593, (4) pp.; CLXVI, 420 pp., 3 portraits, plates and textillustrations.