00277nam a2200109Ia 450000500170000000800410001708200160005810000160007424500290009026000400011930000080015920260224040952.0260224s9999||||xx |||||||||||||| ||und||  a581.134 SKO  aFolke Skoog 0aPlant growth substances,  aUniversity of Wisconsin Pressc1951  a476