Z | T | R | E | F | E | R | E | N | C | E | T | H | P | S |
C | G | I | V | P | U | B | L | I | S | H | E | R | H | O |
V | A | Y | R | D | D | A | T | A | B | A | S | E | H | X |
K | F | H | E | W | N | T | H | G | I | R | Y | P | O | C |
O | N | P | S | R | O | N | L | A | N | R | U | O | J | I |
O | U | A | E | E | I | O | Y | R | A | R | B | I | L | B |
B | K | R | R | P | T | N | D | R | I | D | G | E | D | X |
K | L | G | Q | A | A | F | K | Y | R | N | E | B | Y | M |
V | R | O | A | P | L | I | E | E | A | O | N | O | Y | E |
H | Y | I | G | S | U | C | Y | W | R | I | I | O | T | W |
Y | U | L | I | W | C | T | W | E | B | T | Z | K | P | D |
O | U | B | P | E | R | I | O | D | I | C | A | L | C | P |
A | U | I | N | N | I | O | R | U | L | I | G | I | B | D |
Y | X | B | W | U | C | N | D | K | U | F | A | S | N | Z |
W | K | R | O | H | T | U | A | Q | U | A | M | J | O | G |
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Category: Science