Internation[al] catalogue of agencies and research groups working in phenology /
by Fritz Schnelle, Diana Watley, and Helmut Lieth.
APA Citation
Schnelle, F., Lieth, H., Watley, D., International Biological Programme. (1973). Internation[al] catalogue of agencies and research groups working in phenology. [s.l.: s.n..
MLA Citation
Schnelle, Fritz, 1900-, Helmut Lieth, Diana Watley, and International Biological Programme. Internation[al] Catalogue of Agencies And Research Groups Working In Phenology. [s.l.: s.n., 1973.
Warning: These citations may not always be complete (especially for serials).