00350nam a2200109Ia 4500008004100000082002200041100001900063245007100082260004400153300001000197650003300207140113s9999    xx            000 0 und d  a631.81.098.338 J1  a" Wallace, T."  aThe diagnosis of mineral deficiencies in plants by visual symptoms  b"His majesty's stationery office, 1951"  a107p.  aMineral deficiency diagnosis