TY - BOOK ID - 133963945 TI - Don't help hitchhikers PY - 1964 PB - Hyattsville, Md U.S. Dept. of Agriculture, Agricultural Research Service DB - UniCat KW - Control KW - Diseases and pests KW - Plant quarantine KW - Plants UR - https://www.unicat.be/uniCat?func=search&query=sysid:133963945 AB - ER -