THE DICTIONARY OF SUBSTANCES AND THEIR EFFECTS (A+B), VOL I

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• THE DICTIONARY OF SUBSTANCES AND THEIR EFFECTS (I-M) VOL V
  gan: RICHARDSON, M L
  Cyhoeddwyd: (1992)
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• THE DICTIONARY OF SUBSTANCES AND THEIR EFFECTS (S-Z), VOL VII
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  Cyhoeddwyd: (1994)
• THE DICTIONARY OF SUBSTANCES AND THEIR EFFECTS (D - DIM), VOL III
  gan: RICHARDSON, M L
  Cyhoeddwyd: (1992)
• THE DICTIONARY OF SUBSTANCES AND THEIR EFFECTS (N-R), VOL IV
  gan: RICHARDSON, M L
  Cyhoeddwyd: (1992)