TY - BOOK ID - 133824293 TI - Field experiments with atmospheric-nitrogen fertilizers, published by U.S. Dept. of Agriculture PY - 1924 PB - U.S. Dept. of Agriculture DB - UniCat KW - Nitrogen fertilizers UR - https://www.unicat.be/uniCat?func=search&query=sysid:133824293 AB - ER -